| label
|
instance of
|
image
|
temporal range start
|
temporal range end
|
underlies
|
overlies
|
interleaves with
|
| Aaron Formation
|
formation
|
|
|
|
Virgilina Formation
|
Hyco Formation
|
|
| Abiquiu Formation
|
formation
member
|
|
|
|
|
|
|
| Abo Formation
|
formation
|
|
|
|
Yeso Formation
|
Bursum Formation
|
|
| Abo Group
|
formation
|
|
|
|
|
|
|
| Abrigo Formation
|
formation
|
|
|
|
|
|
|
| Absalona Formation
|
formation
|
|
|
|
|
|
|
| Absaroka Volcanic Supergroup
|
supergroup
|
|
|
|
|
|
|
| Acredale Formation
|
formation
|
|
|
|
|
|
|
| Ada Formation
|
formation
|
|
|
|
|
|
|
| Adam Peak Formation
|
formation
|
|
|
|
|
|
|
| Adams Argillite Formation
|
formation
|
|
|
|
|
|
|
| Admiral Formation
|
formation
|
|
|
|
|
|
|
| Admire Formation
|
formation
|
|
|
|
|
|
|
| Admire Group
|
formation
|
|
|
|
|
|
|
| Agate Creek Tuff
|
formation
|
|
|
|
|
|
|
| Agawam Group
|
formation
|
|
|
|
|
|
|
| Agort Chert
|
formation
|
|
|
|
|
|
|
| Aguada Limestone
|
formation
|
|
|
|
|
|
|
| Aguja Formation
|
formation
|
|
|
|
Javelina Formation
|
Pen Formation
|
|
| Akmalik Chert
|
formation
|
|
|
|
|
|
|
| Akron Formation
|
formation
|
|
|
|
|
|
|
| Al Rose Formation
|
formation
|
|
|
|
Badger Flat Limestone
|
|
|
| Alachua Formation
|
formation
|
|
|
|
|
|
|
| Alacran Mountain Formation
|
formation
|
|
|
|
|
|
|
| Alamitos Formation
|
formation
|
|
|
|
|
Porvenir Formation
|
|
| Alamo Range Formation
|
formation
|
|
|
|
|
|
|
| Alamosa Formation
|
formation
|
|
|
|
|
|
|
| Alapah Limestone
|
formation
|
|
|
|
|
|
|
| Albany Group
|
formation
|
|
|
|
|
|
|
| Albemarle Group
|
group
|
|
|
|
|
|
|
| Alboroto Rhyolite
|
formation
|
|
|
|
|
|
|
| Alcova Limestone
|
formation
|
|
|
|
|
|
|
| Alder Creek Tuff
|
formation
|
|
|
|
|
|
|
| Aldrich Mountains Group
|
group
|
|
|
|
|
|
|
| Aldrich Station Formation
|
formation
|
|
|
|
Coal Valley Formation
|
|
|
| Aleman Formation
|
formation
|
|
|
|
|
|
|
| Alfred Shale
|
formation
|
|
|
|
|
|
|
| Alkali Canyon Formation
|
formation
|
|
|
|
|
|
|
| Allamoore Formation
|
formation
|
|
|
|
|
|
|
| Allan Mountain Limestone
|
formation
|
|
|
|
|
|
|
| Allegheny Formation
|
formation
|
|
|
|
Conemaugh Group
|
Kanawha Formation
|
|
| Allen Ridge Formation
|
formation
|
|
|
|
|
|
|
| Almond Formation
|
formation
|
|
|
|
|
|
|
| Almy Formation
|
formation
|
|
|
|
|
|
|
| Alpena Formation
|
formation
|
|
|
|
Thunder Bay Limestone
|
Long Lake Limestone
|
|
| Alsea Formation
|
formation
|
|
|
|
|
|
|
| Alta Formation
|
formation
|
|
|
|
|
|
|
| Altamira Shale
|
formation
|
|
|
|
|
|
|
| Altamont Formation
|
formation
|
|
|
|
|
|
|
| Altamont Limestone
|
formation
|
|
|
|
|
|
|
| Altamount Formation
|
formation
|
|
|
|
|
|
|
| Altuda Formation
|
formation
|
|
|
|
|
|
|
| Altyn Formation
|
formation
|
|
|
|
Appekunny Formation
|
|
|
| Alum Bluff Group
|
group
|
|
|
|
|
|
|
| Alvy Creek Formation
|
formation
|
|
|
|
|
|
|
| Amalia Tuff
|
formation
|
|
|
|
|
|
|
| American Ravine Andesite Porphyry
|
formation
|
|
|
|
|
|
|
| Americus Formation
|
formation
|
|
|
|
|
|
|
| Ammonia Tanks Tuff
|
formation
|
|
|
|
|
|
|
| Ammonoosuc Volcanics
|
formation
|
|
|
|
|
|
|
| Amole Arkose
|
formation
|
|
|
|
|
|
|
| Amole Formation
|
formation
|
|
|
|
|
|
|
| Amsden Formation
|
formation
|
|
|
|
|
|
|
| Amsterdam Limestone
|
formation
|
|
|
|
|
|
|
| Anacacho Limestone
|
formation
|
|
|
|
|
|
|
| Anahuac Formation
|
formation
|
|
|
|
|
|
|
| Anastasia Formation
|
formation
|
|
|
|
|
|
|
| Ancha Formation
|
formation
|
|
|
|
|
Tesuque Formation
|
|
| Anchor Limestone
|
formation
|
|
|
|
|
|
|
| Andorno Formation
|
formation
|
|
|
|
|
|
|
| Angola Formation
|
formation
|
|
|
|
|
|
|
| Animas Formation
|
formation
|
|
|
|
|
|
|
| Annona Chalk
|
formation
|
|
|
|
Ozan Formation
|
Brownstone Marl
|
|
| Antelope Range Formation
|
formation
|
|
|
|
|
|
|
| Antelope Shale
|
formation
|
|
|
|
Etchegoin Formation
|
|
|
| Antelope Springs Formation
|
formation
|
|
|
|
Lori Formation
|
Hollywood Formation
|
|
| Antelope Valley Limestone
|
formation
|
|
|
|
Copenhagen Formation
|
Ninemile Formation
|
|
| Anthracite Formation
|
formation
|
|
|
|
|
|
|
| Antietam Formation
|
formation
|
|
|
|
Tomstown Dolomite
|
Harpers Formation
|
|
| Antler Peak Formation
|
formation
|
|
|
|
|
Battle Formation
|
|
| Antler Peak Limestone
|
formation
|
|
|
|
|
|
|
| Antlers Formation
|
formation
|
|
|
|
|
|
|
| Antrim Shale
|
formation
|
|
|
|
Bedford Shale
|
Squaw Bay Limestone
|
|
| Apache Group
|
group
|
|
|
|
|
|
|
| Apodaca Formation
|
formation
|
|
|
|
|
|
|
| Appanoose Formation
|
formation
|
|
|
|
|
|
|
| Appekunny Formation
|
formation
|
|
|
|
|
Altyn Formation
|
|
| Apple Creek Formation
|
formation
|
|
|
|
|
|
|
| Aquia Formation
|
formation
|
|
|
|
|
|
|
| Arapien Formation
|
formation
|
|
|
|
|
|
|
| Arbuckle Group
|
formation
|
|
|
|
|
|
|
| Arcadia Formation
|
formation
|
|
|
|
|
Ocala Limestone
|
|
| Arcadia Park Shale
|
formation
geographic location
|
|
|
|
Austin Chalk
|
Britton Formation
|
|
| Archer City Formation
|
formation
|
|
|
|
|
|
|
| Arco Hills Formation
|
formation
|
|
|
|
|
|
|
| Arcturus Formation
|
formation
|
|
|
|
|
|
|
| Ardath Shale
|
formation
|
|
|
|
|
|
|
| Argo Gneiss
|
formation
|
|
|
|
|
|
|
| Arikaree Formation
|
formation
|
|
|
|
|
Chadron Formation
|
|
| Arikaree Group
|
formation
|
|
|
|
|
|
|
| Arkadelphia Marl
|
formation
|
|
|
|
Midway Group
|
Nacatoch Formation
|
|
| Armendaris Group
|
formation
|
|
|
|
|
|
|
| Arnheim Formation
|
formation
|
|
|
|
Waynesville Formation
|
Grant Lake Formation
|
|
| Arrey Formation
|
formation
|
|
|
|
|
|
|
| Arrow Canyon Formation
|
formation
|
|
|
|
|
|
|
| Arroyo Formation
|
formation
|
|
|
|
|
|
|
| Arroyo Ojito Formation
|
formation
|
|
|
|
|
|
|
| Arroyo Penasco Formation
|
formation
|
|
|
|
Log Springs Formation
|
Precambrian
|
|
| Artesia Lake Volcanics
|
formation
|
|
|
|
|
|
|
| Artist Drive Formation
|
formation
|
|
|
|
|
|
|
| Artpark Phosphate Bed
|
bed
|
|
|
|
|
|
|
| Arundel Formation
|
formation
|
|
|
|
Patapsco Formation
|
Patuxent Formation
|
|
| Arvison Formation
|
formation
|
|
|
|
|
|
|
| Asbill Pond Formation
|
formation
|
|
|
|
|
|
|
| Ash Hollow Formation
|
formation
|
|
|
|
|
|
|
| Ashdown Tuff
|
formation
|
|
|
|
|
|
|
| Ashe Metamorphic Suite
|
formation
|
|
|
|
|
|
|
| Ashley Formation
|
formation
|
|
|
|
|
|
|
| Ashlock Formation
|
formation
|
|
|
|
Drakes Formation
|
Calloway Creek Formation
|
|
| Ashokan Formation
|
formation
|
|
|
|
|
|
|
| Aspen Range Formation
|
formation
|
|
|
|
|
|
|
| Aspen Shale
|
formation
|
|
|
|
|
|
|
| Asphalt Ridge Sandstone
|
formation
|
|
|
|
|
|
|
| Astoria Formation
|
formation
|
|
|
|
|
|
|
| Asuncion Group
|
formation
|
|
|
|
|
|
|
| Atarque Sandstone
|
formation
|
|
|
|
|
|
|
| Atco Formation
|
formation
|
|
|
|
|
|
|
| Athens Formation
|
formation
|
|
|
|
|
|
|
| Atoka Formation
|
formation
|
|
|
|
Hartshorne Formation
|
Bloyd Formation
Jackfork Sandstone
|
|
| Atrasado Formation
|
formation
|
|
|
|
|
|
|
| Au Train Formation
|
formation
|
|
|
|
Black River Formation
|
Munising Formation
|
|
| Auburn Formation
|
formation
|
|
|
|
|
|
|
| Augusta Mountain Formation
|
formation
|
|
|
|
|
|
|
| Auld Lang Syne Group
|
group
|
|
|
|
|
|
|
| Aura Formation
|
formation
|
|
|
|
|
|
|
| Austin Chalk
|
formation
group
|
|
|
|
|
|
|
| Austin Glen Member
|
formation
|
|
|
|
|
|
|
| Avawatz Formation
|
formation
|
|
|
|
|
|
|
| Avon Park Formation
|
formation
|
|
|
|
Ocala Limestone
|
|
|
| Aycross Formation
|
formation
|
|
|
|
|
|
|
| Aymamón Limestone
|
formation
|
|
|
|
|
|
|
| Aztec Granodiorite
|
formation
|
|
|
|
|
|
|
| Aztec Sandstone
|
formation
|
|
|
|
|
Chinle Formation
|
|
| Baca Formation
|
formation
|
|
|
|
|
|
|
| Badger Flat Formation
|
formation
|
|
|
|
|
|
|
| Badger Flat Limestone
|
formation
|
|
|
|
Barrel Spring Formation
|
Al Rose Formation
|
|
| Badger Valley Basalt
|
formation
|
|
|
|
|
|
|
| Bailey Spring Limestone
|
formation
|
|
|
|
|
|
|
| Bainbridge Group
|
group
|
|
|
|
|
|
|
| Baird Formation
|
formation
|
|
|
|
|
|
|
| Bakken formation
|
formation
|
|
|
|
Madison Group
|
Wabamun Formation
|
|
| Bald Eagle Formation
|
formation
|
|
|
|
Juniata Formation
|
Reedsville Formation
|
|
| Bald Mountain Formation
|
formation
|
|
|
|
|
|
|
| Baldy Hill Formation
|
formation
|
|
|
|
|
|
|
| Balls Bluff Siltstone
|
formation
|
|
|
|
Tibbstown Formation
|
Manassas Sandstone
|
|
| Baltimore Gabbro Complex
|
formation
|
|
|
|
|
|
|
| Baltimore Gneiss
|
formation
|
|
Stenian
|
Stenian
|
|
|
|
| Bandelier Tuff
|
formation
|
|
|
|
No/unknown value
|
No/unknown value
|
|
| Bandera Formation
|
formation
|
|
|
|
|
|
|
| Bandera Shale
|
formation
|
|
|
|
|
|
|
| Bangor Formation
|
formation
|
|
|
|
|
|
|
| Bangor Limestone
|
formation
|
|
|
|
|
|
|
| Banner Formation
|
formation
|
|
|
|
|
|
|
| Bannock Peak Limestone
|
formation
|
|
|
|
|
|
|
| Banta Shut Formation
|
formation
|
|
|
|
|
|
|
| Baraboo Quartzite
|
formation
|
|
|
|
|
|
|
| Baraga Group
|
group
|
|
|
|
|
|
|
| Bardstown Formation
|
formation
|
|
|
|
|
|
|
| Barneston Formation
|
formation
|
|
|
|
|
|
|
| Barneston Limestone
|
formation
|
|
|
|
|
|
|
| Barnett Shale
|
natural gas field
formation
|
|
|
|
|
|
|
| Barney Creek Amphibolite
|
formation
|
|
|
|
|
|
|
| Barnsdall Formation
|
formation
|
|
|
|
|
|
|
| Barnwell Group
|
group
|
|
|
|
|
|
|
| Barnwell Sand
|
formation
|
|
|
|
|
|
|
| Barranquitas Formation
|
formation
|
|
|
|
|
|
|
| Barrel Spring Formation
|
formation
|
|
|
|
Johnson Spring Formation
|
Badger Flat Limestone
|
|
| Barrel Springs Formation
|
formation
|
|
|
|
|
|
|
| Barstow Formation
|
formation
|
|
|
|
|
|
|
| Basco Formation
|
formation
|
|
|
|
|
|
|
| Baseline Sandstone
|
formation
|
|
|
|
|
|
|
| Bashi Formation
|
formation
|
|
|
|
|
|
|
| Bass Formation
|
formation
|
|
|
|
Hakatai Shale
|
Vishnu Basement Rocks
|
|
| Bass Islands Group
|
group
|
|
|
|
Amherstburg Formation
|
Salina Formation
|
|
| Bates Mountain Tuff
|
formation
|
|
|
|
|
|
|
| Batesland Formation
|
formation
|
|
|
|
|
|
|
| Batesville Sandstone
|
formation
|
|
|
|
Fayetteville Shale
|
|
|
| Battery Formation
|
formation
|
|
|
|
|
|
|
| Battle Formation
|
formation
|
|
|
|
Antler Peak Formation
|
|
|
| Battle Mountain Formation
|
formation
|
|
|
|
|
|
|
| Battleship Wash Formation
|
formation
|
|
|
|
|
|
|
| Bautista Formation
|
formation
|
|
|
|
|
|
|
| Baxter Shale
|
formation
|
|
|
|
|
|
|
| Bay State Dolomite
|
formation
|
|
|
|
|
|
|
| Bayfield group
|
group
|
|
|
|
|
Oronto Group
|
|
| Bays Formation
|
formation
|
|
|
|
|
|
|
| Bayshore Formation
|
formation
|
|
|
|
|
|
|
| Beacon Flat Formation
|
formation
|
|
|
|
|
|
|
| Beacon Peak Dolomite
|
formation
|
|
|
|
|
|
|
| Bead Mountain Formation
|
formation
|
|
|
|
|
|
|
| Bear Bluff Formation
|
formation
|
|
|
|
|
|
|
| Bear Canyon Formation
|
formation
|
|
|
|
|
|
|
| Bear Creek Shale
|
formation
|
|
|
|
|
|
|
| Bear Formation
|
formation
|
|
|
|
|
|
|
| Bear Lake Formation
|
formation
|
|
|
|
|
|
|
| Bear River Formation
|
formation
|
|
|
|
|
|
|
| Bearpaw Shale
|
formation
|
|
|
|
Horseshoe Canyon Formation
|
Judith River Formation
Dinosaur Park Formation
|
|
| Beartooth Butte Formation
|
formation
|
|
|
|
|
|
|
| Beattie Formation
|
formation
|
|
|
|
|
|
|
| Beattie Limestone
|
formation
|
|
|
|
|
Eskridge Shale
|
|
| Beatty Wash Formation
|
formation
|
|
|
|
|
|
|
| Beaumont Formation
|
formation
|
|
|
|
|
|
|
| Beaver Bay Group
|
group
|
|
|
|
|
|
|
| Beaverdam Formation
|
formation
|
|
|
|
|
|
|
| Beaverdam Formation (Delmarva)
|
formation
|
|
|
|
|
|
|
| Beck Spring Dolomite
|
formation
|
|
|
|
Kingston Peak Formation
|
Crystal Spring Formation
|
|
| Becraft Formation
|
formation
|
|
|
|
|
New Scotland Formation
|
|
| Becraft Limestone
|
formation
|
|
|
|
|
|
|
| Bedford Shale
|
formation
|
|
|
|
Berea Sandstone
|
Cussewago Sandstone
|
|
| Bedrock Spring Formation
|
formation
|
|
|
|
|
|
|
| Beech Creek Formation
|
formation
|
|
|
|
Fraileys Formation
|
Cypress Formation
|
|
| Beech Creek Limestone
|
formation
|
|
|
|
Big Clifty Formation
|
Cypress Formation
|
|
| Beechwood Formation
|
formation
|
|
|
|
|
|
|
| Beechwood Limestone
|
formation
|
|
|
|
|
|
|
| Beekmantown Group
|
formation
|
|
|
|
|
Potsdam Sandstone
|
|
| Beers Hill Formation
|
formation
|
|
|
|
|
|
|
| Belden Shale
|
formation
|
|
|
|
|
|
|
| Belgrade Formation
|
formation
|
|
|
|
|
|
|
| Bell Canyon Formation
|
formation
|
|
|
|
|
|
|
| Bell Creek Gneiss
|
formation
|
|
|
|
|
|
|
| Bell Ranch Formation
|
formation
|
|
|
|
|
|
|
| Bell Shale
|
formation
|
|
|
|
Rockport Quarry Limestone
|
Rogers City Formation
|
|
| Bell Springs Formation
|
formation
|
|
|
|
|
|
|
| Belle Fourche Formation
|
formation
|
|
|
|
|
|
|
| Belle Plains Formation
|
formation
|
|
|
|
|
|
|
| Bellefonte Formation
|
formation
|
|
|
|
|
|
|
| Belleville Formation
|
formation
|
|
|
|
|
|
|
| Belleville Tuff
|
formation
|
|
|
|
|
|
|
| Bellevue Formation
|
formation
|
|
|
|
|
|
|
| Bellvale Sandstone
|
formation
|
|
|
|
Skunnemunk Conglomerate
|
|
|
| Belmont Fanglomerate
|
formation
|
|
|
|
|
|
|
| Below Genesee Formation
|
formation
|
|
|
|
|
|
|
| Belt Supergroup
|
supergroup
|
|
|
|
|
Archean
|
|
| Belted Range Group
|
group
|
|
|
|
|
|
|
| Belvidere Formation
|
formation
|
|
|
|
|
|
|
| Benbolt Formation
|
formation
|
|
|
|
|
|
|
| Bend Group
|
formation
|
|
|
|
|
|
|
| Benevides Formation
|
formation
|
|
|
|
|
|
|
| Benigno Limestone
|
formation
|
|
|
|
Lagrima Formation
|
Cuchillo Formation
|
|
| Benton Formation
|
formation
|
|
|
|
|
|
|
| Benton Shale
|
formation
|
|
|
|
Niobrara Formation
|
Dakota Formation
|
|
| Benton Spring Group
|
group
|
|
|
|
|
|
|
| Berea Sandstone
|
formation
|
|
|
|
Sunbury Shale
|
Bedford Shale
|
|
| Bergland Group
|
group
|
|
|
|
|
|
|
| Bermont Formation
|
formation
|
|
|
|
|
|
|
| Bernice Formation
|
formation
|
|
|
|
|
|
|
| Bertie Formation
|
formation
|
|
|
|
|
|
|
| Bertie Group
|
formation
|
|
|
|
|
|
|
| Bessemer Quartzite
|
formation
|
|
|
|
|
|
|
| Bethel Formation
|
formation
|
|
|
|
Beaver Bend Limestone
|
Paoli Limestone
|
|
| Bidahochi Formation
|
formation
|
|
|
|
tuff
|
Chinle Formation
|
|
| Bieroth Andesite
|
formation
|
|
|
|
|
|
|
| Big Bear Group
|
group
|
|
|
|
|
|
|
| Big Blue Formation
|
formation
|
|
|
|
|
|
|
| Big Clifty Formation
|
formation
|
|
|
|
Haney Formation
|
Beech Creek Limestone
|
|
| Big Clifty Sandstone
|
formation
|
|
|
|
|
|
|
| Big Cottonwood Formation
|
formation
|
|
|
|
|
|
|
| Big Creek Formation
|
formation
|
|
|
|
|
|
|
| Big Dome Formation
|
formation
|
|
|
|
|
|
|
| Big Hill Formation
|
formation
|
|
|
|
Manitoulin Dolomite
|
Stonington Formation
|
|
| Big Island Formation
|
formation
|
|
|
|
|
|
|
| Big Pole Formation
|
formation
|
|
|
|
|
|
|
| Big Sandy Formation
|
formation
|
|
|
|
|
|
|
| Big Snowy Formation
|
formation
|
|
|
|
|
|
|
| Big Stone Gap Shale
|
formation
|
|
|
|
|
|
|
| Bigby Formation
|
formation
|
|
|
|
|
|
|
| Bigfork Chert
|
formation
|
|
|
|
Polk Creek Shale
|
Womble Shale
|
|
| Bighorn Dolomite
|
formation
|
|
|
|
|
Gallatin Formation
|
|
| Bill's Creek Shale
|
formation
|
|
|
|
Stonington Formation
|
Collingwood Shale
|
|
| Billman Creek Formation
|
formation
|
|
|
|
|
|
|
| Bingham Mine Formation
|
formation
|
|
|
|
|
|
|
| Birch Hills dacite
|
formation
|
|
|
|
|
|
|
| Bird Spring Formation
|
formation
|
|
|
|
|
|
|
| Bird Spring Group
|
group
|
|
|
|
|
|
|
| Birdbear Formation
|
formation
|
|
|
|
|
|
|
| Birdsong Shale
|
formation
|
|
|
|
|
|
|
| Bisbee Group
|
formation
|
|
|
|
|
|
|
| Bisher Formation
|
formation
|
|
|
|
Crab Orchard Formation
|
Boyle Formation
|
|
| Bishop Cap Formation
|
formation
|
|
|
|
|
|
|
| Bishop Tuff
|
formation
|
|
|
|
|
|
|
| Bishop ash bed
|
bed
formation
|
|
|
|
|
|
|
| Bissell Formation
|
lithostratigraphic unit
formation
|
|
|
|
|
|
|
| Bissett Formation
|
formation
|
|
|
|
|
|
|
| Biwabik Iron Formation
|
formation
|
|
|
|
|
|
|
| Black Box Dolomite
|
formation
|
|
|
|
|
|
|
| Black Canyon Latite
|
formation
|
|
|
|
|
|
|
| Black Creek Formation
|
formation
|
|
|
|
|
|
|
| Black Creek Group
|
group
|
|
|
|
|
|
|
| Black Dyke Formation
|
formation
|
|
|
|
|
|
|
| Black Mesa Gravel
|
formation
|
|
|
|
|
|
|
| Black Mingo Group
|
formation
|
|
|
|
|
|
|
| Black Peaks Formation
|
formation
|
|
|
|
|
Javelina Formation
|
|
| Black Prince Limestone
|
formation
|
|
|
|
|
|
|
| Black River Group
|
formation
|
|
|
|
Lexington Limestone
Trenton Group
|
St. Paul Group
Wells Creek Formation
|
|
| Blackford Formation
|
formation
|
|
|
|
|
|
|
| Blackhawk Formation
|
formation
|
|
|
|
|
|
|
| Blackiston Formation
|
formation
|
|
|
|
|
|
|
| Blackleaf Formation
|
formation
|
|
|
|
|
|
|
| Blackrock Quartzite
|
formation
|
|
|
|
|
|
|
| Blacktail Deer Creek Formation
|
formation
|
|
|
|
|
|
|
| Bladen Formation
|
formation
|
|
|
|
|
|
|
| Blaine Formation
|
formation
|
|
|
|
|
|
|
| Blair Creek Formation
|
formation
|
|
|
|
|
|
|
| Blair Formation
|
formation
|
|
|
|
|
|
|
| Blakeley Formation
|
formation
|
|
|
|
|
|
|
| Blakely Sandstone
|
formation
|
|
|
|
Womble Shale
|
Mazarn Shale
|
|
| Blanco Formation
|
formation
|
|
|
|
|
|
|
| Blanding Formation
|
formation
|
|
|
|
|
|
|
| Blaylock Sandstone
|
formation
|
|
|
|
Missouri Mountain Shale
|
Polk Creek Shale
|
|
| Blind Spring Formation
|
formation
|
|
|
|
|
|
|
| Bliss Formation
|
formation
|
|
|
|
|
|
|
| Block Coal Formation
|
formation
|
|
|
|
|
|
|
| Bloomsburg Formation
|
formation
|
|
|
|
Wills Creek Formation
|
Clinton Group
|
|
| Blossom Sand
|
formation
|
|
|
|
|
|
|
| Bloyd Formation
|
formation
|
|
|
|
Atoka Formation
|
Hale Formation
|
|
| Bloyd Shale
|
formation
|
|
|
|
|
|
|
| Blue Bluff Formation
|
formation
|
|
|
|
|
|
|
| Blue River Group
|
formation
|
|
|
|
|
|
|
| Blue Sphinx Tuff
|
formation
|
|
|
|
|
|
|
| Bluebird Mountain Formation
|
formation
|
|
|
|
|
|
|
| Bluefield Formation
|
formation
|
|
|
|
Hinton Formation
|
Greenbrier Limestone
|
|
| Bluefield Shale
|
formation
|
|
|
|
|
|
|
| Bluepoint Limestone
|
formation
|
|
|
|
|
|
|
| Bluestone Formation
|
formation
|
|
|
|
Pocahontas Formation
|
Princeton Sandstone
|
|
| Bluestone Mine Tuff
|
formation
|
|
|
|
|
|
|
| Bluewater Creek Formation
|
formation
|
|
|
|
|
|
|
| Bluff Creek Formation
|
formation
|
|
|
|
|
|
|
| Bluff Dale Sandstone
|
formation
|
|
|
|
|
|
|
| Blufftown Formation
|
formation
|
|
|
|
|
|
|
| Boggy Formation
|
formation
|
|
|
|
|
Savanna Sandstone
|
|
| Bois Blanc Formation
|
formation
|
|
|
|
Onondaga Formation
|
Garden Island Formation
|
|
| Bois d'Arc Formation
|
formation
|
|
|
|
|
|
|
| Bolander Formation
|
formation
|
|
|
|
|
|
|
| Bolsa Quartzite
|
formation
|
|
|
|
|
|
|
| Bon Homme Gravel
|
formation
|
|
|
|
|
|
|
| Bonanza King Formation
|
formation
|
|
|
|
|
|
|
| Bond Formation
|
formation
|
|
|
|
Mattoon Formation
|
Patoka Formation
|
|
| Bone Spring Limestone
|
formation
|
|
|
|
|
|
|
| Bone Valley Formation
|
formation
|
|
|
|
Pleistocene
|
Peace River Formation
|
|
| Bonita Canyon Formation
|
formation
|
|
|
|
|
|
|
| Bonner Formation
|
formation
|
|
|
|
|
|
|
| Bonneterre Formation
|
formation
|
|
|
|
Davis Formation
|
|
|
| Boone Formation
|
formation
|
|
|
|
Batesville Sandstone
|
Chattanooga Shale
|
|
| Boonton Formation
|
formation
|
|
|
|
Potomac Group
|
|
|
| Bopesta Formation
|
formation
|
|
|
|
|
|
|
| Boquillas Formation
|
formation
|
|
|
|
Austin Chalk
|
Buda Limestone
|
|
| Borden Formation
|
formation
group
|
|
|
|
|
|
|
| Bossier Formation
|
formation
|
|
|
|
|
|
|
| Boston Bay Group
|
group
|
|
|
|
|
|
|
| Bostwick Formation
|
formation
|
|
|
|
|
|
|
| Boulder Wash Group
|
group
|
|
|
|
|
|
|
| Bouse Formation
|
formation
|
|
|
|
|
|
|
| Bow Quartzite
|
formation
|
|
|
|
|
|
|
| Bowen Formation
|
formation
|
|
|
|
|
|
|
| Bowling Green Dolomite
|
formation
|
|
|
|
|
Bryant Knob Formation
|
|
| Bowser Formation
|
formation
|
|
|
|
|
|
|
| Box Butte Formation
|
formation
|
|
|
|
|
|
|
| Box Canyon Formation
|
formation
|
|
|
|
|
|
|
| Boyer Ranch Formation
|
formation
|
|
|
|
|
|
|
| Boyle Formation
|
formation
|
|
|
|
New Albany Shale
|
|
|
| Brad Formation
|
formation
|
|
|
|
|
|
|
| Bragdon Formation
|
formation
|
|
|
|
|
|
|
| Brainard Formation
|
formation
|
|
|
|
|
|
|
| Brainard Shale
|
formation
|
|
|
|
Brassfield Formation
|
Fort Atkinson Limestone
|
|
| Bralier Formation
|
formation
|
|
|
|
|
|
|
| Brallier Formation
|
formation
|
|
|
|
Greenland Gap Group
|
Harrell Formation
|
|
| Branch Canyon Formation
|
formation
|
|
|
|
|
|
|
| Branchville Formation
|
formation
|
|
|
|
Tobinsport Formation
|
Tar Springs Formation
|
|
| Brandon Bridge Formation
|
formation
|
|
|
|
|
|
|
| Brassfield Formation
|
formation
|
|
|
|
Crab Orchard Formation
|
Brainard Shale
Cason Shale
|
|
| Brassfield Limestone
|
formation
|
|
|
|
|
|
|
| Brawley Formation
|
formation
|
|
|
|
|
Ocotillo Formation
|
|
| Brazer Dolomite
|
formation
|
|
|
|
|
|
|
| Brazil Formation
|
formation
|
|
|
|
Staunton Formation
|
Mansfield Formation
|
|
| Breathitt Formation
|
formation
|
|
|
|
|
|
|
| Brian Head Formation
|
formation
|
|
|
|
|
|
|
| Bridal Veil Limestone
|
formation
|
|
|
|
|
|
|
| Bridgeboro Limestone
|
formation
|
|
|
|
|
|
|
| Bridger Formation
|
formation
|
|
|
|
|
Green River Formation
|
|
| Bridwell Formation
|
formation
|
|
|
|
|
|
|
| Briggs Formation
|
formation
|
|
|
|
|
|
|
| Bright Angel Shale
|
formation
|
|
|
|
Muav Limestone
|
Tapeats Sandstone
|
|
| Brightseat Formation
|
formation
|
|
|
|
|
|
|
| Briones Sandstone
|
formation
|
|
|
|
|
|
|
| Brisbois Formation
|
formation
|
|
|
|
|
|
|
| Bristol Pass Limestone
|
formation
|
|
|
|
|
|
|
| Britt granodiorite
|
formation
|
|
|
|
|
|
|
| Britton Formation
|
formation
|
|
|
|
Arcadia Park Shale
|
Tarrant Formation
|
|
| Broad Canyon Formation
|
formation
|
|
|
|
|
|
|
| Brock Canyon Formation
|
formation
|
|
|
|
|
|
|
| Brock Shale
|
formation
|
|
|
|
|
|
|
| Bromide Formation
|
formation
|
|
|
|
|
|
|
| Bronson Group
|
formation
|
|
|
|
|
|
|
| Brougher Rhyolite
|
formation
|
|
|
|
|
|
|
| Brown Siltstone Beds
|
formation
|
|
|
|
|
|
|
| Browns Park Formation
|
formation
|
|
|
|
|
|
|
| Brownsport Group
|
formation
|
|
|
|
|
|
|
| Brownstone Marl
|
formation
|
|
|
|
Ozan Formation
|
Tokio Formation
|
|
| Brownstown Formation
|
formation
|
|
|
|
|
|
|
| Brownville Formation
|
formation
|
|
|
|
|
|
|
| Brule Formation
|
formation
|
|
|
|
Sharps Formation
|
Chadron Formation
|
|
| Bruneau Formation
|
formation
|
|
|
|
|
|
|
| Brushy Canyon Formation
|
formation
|
|
|
|
|
|
|
| Brushy Knob Formation
|
formation
|
|
|
|
|
|
|
| Bryant Knob Formation
|
formation
|
|
|
|
Bowling Green Dolomite
|
Noix Limestone
|
|
| Bucatunna Formation
|
formation
|
|
|
|
|
|
|
| Buchia Ridge Formation
|
formation
|
|
|
|
|
|
|
| Buck and Doe Conglomerate
|
formation
|
|
|
|
|
|
|
| Buckingham Formation
|
formation
|
|
|
|
|
|
|
| Buckskin Mountain Formation
|
formation
|
|
|
|
|
|
|
| Buda Limestone
|
formation
|
|
|
|
Eagle Ford Group
|
Del Rio Formation
|
|
| Budden Canyon Formation
|
formation
|
|
|
|
|
|
|
| Buffalo Canyon Formation
|
formation
|
|
|
|
|
|
|
| Buffington Formation
|
formation
|
|
|
|
|
|
|
| Bull Fork Formation
|
formation
|
|
|
|
Drakes Formation
|
Grant Lake Formation
|
|
| Bull Run Formation
|
formation
|
|
|
|
|
|
|
| Bull Run Quartzite
|
formation
|
|
|
|
|
|
|
| Bullfrog Tuff
|
formation
|
|
|
|
Prow Pass Tuff
|
Tram Tuff
|
|
| Bullhead Alluvium
|
formation
|
|
|
|
|
|
|
| Bullion Creek Formation
|
formation
|
|
|
|
Sentinel Butte Formation
|
Slope Formation
|
|
| Bullion Limestone
|
formation
|
|
|
|
|
|
|
| Bumpnose Formation
|
formation
|
|
|
|
|
|
|
| Bunejug Formation
|
formation
|
|
|
|
|
|
|
| Burgner Formation
|
formation
|
|
|
|
|
|
|
| Burke Formation
|
formation
|
|
|
|
|
|
|
| Burlingame Formation
|
formation
|
|
|
|
|
|
|
| Burlington Limestone
|
formation
|
|
|
|
Keokuk Limestone
|
Fern Glen Formation
|
|
| Burnt Brook Formation
|
formation
|
|
|
|
|
|
|
| Burntside Gneiss
|
formation
|
|
|
|
|
|
|
| Burro Canyon Formation
|
formation
|
|
|
|
Mancos Shale
|
Morrison Formation
|
|
| Bursum Formation
|
formation
|
|
|
|
Abo Formation
|
Wild Cow Formation
|
|
| Busby Quartzite
|
formation
|
|
|
|
|
|
|
| Bush Bay Formation
|
formation
|
|
|
|
Pointe aux Chenes Formation
|
Rapson Creek Formation
|
|
| Bushnell Rock Formation
|
formation
|
|
|
|
|
|
|
| Butano Sandstone
|
formation
|
|
|
|
|
|
|
| Butte Creek Formation
|
formation
|
|
|
|
|
|
|
| Butte Creek Volcanic Sandstone
|
formation
|
|
|
|
|
|
|
| Butte Mountain Formation
|
formation
|
|
|
|
|
|
|
| Butterfield Formation
|
formation
|
|
|
|
|
|
|
| Butterfield Peaks Formation
|
formation
|
|
|
|
|
|
|
| Byers Canyon Formation
|
formation
|
|
|
|
|
|
|
| Byram Formation
|
formation
|
|
|
|
|
|
|
| Byram Marl
|
formation
|
|
|
|
|
|
|
| Byron Formation
|
formation
|
|
|
|
Hendricks Formation
|
Lime Island Formation
|
|
| Caballero Formation
|
formation
|
|
|
|
|
|
|
| Caballos Novaculite
|
formation
|
|
|
|
|
|
|
| Cabaniss Formation
|
formation
|
|
|
|
|
|
|
| Cabot Head Formation
|
formation
|
|
|
|
|
|
|
| Cabot Head Shale
|
formation
|
|
|
|
Dayton Formation
|
Manitoulin Dolomite
|
|
| Cabrillo Formation
|
formation
|
|
|
|
|
Point Loma Formation
|
|
| Cache Formation
|
formation
|
|
|
|
|
|
|
| Caddo Creek Formation
|
formation
|
|
|
|
|
|
|
| Cadiz Formation
|
formation
|
|
|
|
|
|
|
| Caesar Canyon Limestone
|
formation
|
|
|
|
|
|
|
| Caetano Tuff
|
formation
|
|
|
|
Fish Creek Mountains Tuff
|
|
|
| Cajon Valley Beds
|
formation
|
|
|
|
|
|
|
| Calabasas Formation
|
formation
|
|
|
|
|
|
|
| Calera Limestone
|
formation
|
|
|
|
|
|
|
| Calhouns Shale
|
formation
|
|
|
|
|
|
|
| Calico Hills Formation
|
formation
|
|
|
|
|
|
|
| Caliente Formation
|
formation
|
|
|
|
|
|
|
| Callaway Limestone
|
formation
|
|
|
|
|
|
|
| Calloway Creek Formation
|
formation
|
|
|
|
Ashlock Formation
|
Garrard Siltstone
|
|
| Calloway Well Formation
|
formation
|
|
|
|
|
|
|
| Callville Limestone
|
formation
|
|
|
|
|
|
|
| Caloosahatchee Formation
|
formation
|
|
|
|
|
|
|
| Calvert Ash Bed
|
formation
|
|
|
|
|
|
|
| Camas Valley Formation
|
formation
|
|
|
|
|
|
|
| Cambria Felsite
|
formation
|
|
|
|
|
|
|
| Cambria Shale
|
formation
|
|
|
|
Kodak Sandstone
|
Thorold Sandstone
|
|
| Cameron Creek Formation
|
formation
|
|
|
|
|
|
|
| Camp Creek Formation
|
formation
|
|
|
|
|
|
|
| Camp Nelson Limestone
|
formation
|
|
|
|
Oregon Formation
|
|
|
| Camp Rice Formation
|
formation
|
|
|
|
|
|
|
| Camp Springs Formation
|
formation
|
|
|
|
|
|
|
| Campito Formation
|
formation
|
|
|
|
Poleta Formation
|
Deep Spring Formation
|
|
| Canaan Peak Formation
|
formation
|
|
|
|
|
|
|
| Canadaway Group
|
group
|
|
|
|
|
|
|
| Canajoharie Formation
|
formation
|
|
|
|
|
|
|
| Canaseraga Sandstone
|
formation
|
|
|
|
|
|
|
| Candelaria Formation
|
formation
|
|
|
|
|
|
|
| Cane Acre Formation
|
formation
|
|
|
|
|
|
|
| Cane Spring Formation
|
formation
|
|
|
|
|
|
|
| Canepatch Formation
|
formation
|
|
|
|
|
|
|
| Cannery Formation
|
formation
|
|
|
|
|
|
|
| Cannonball Concretions Pullout
|
formation
|
|
|
|
|
|
|
| Cannonball Formation
|
formation
|
|
|
|
Bullion Creek Formation
|
Hell Creek Formation
|
|
| Canoe Formation
|
formation
|
|
|
|
|
|
|
| Cantwell Formation
|
formation
|
|
|
|
|
|
|
| Canyon Group
|
group
|
|
|
|
|
|
|
| Capay Formation
|
formation
|
|
|
|
|
|
|
| Cape Deceit Formation
|
formation
|
|
|
|
|
|
|
| Cape Formation
|
formation
|
|
|
|
|
|
|
| Cape Limestone
|
formation
|
|
|
|
|
|
|
| Cape May Formation
|
formation
|
|
|
|
|
|
|
| Cape Sebastian Sandstone
|
formation
|
|
|
|
|
|
|
| Capistrano Formation
|
formation
|
|
|
|
|
|
|
| Capitan Formation
|
formation
|
|
|
|
|
|
|
| Capote Mountain Tuff
|
formation
|
|
|
|
|
|
|
| Capps Formation
|
formation
|
|
|
|
|
|
|
| Carbon Ridge Formation
|
formation
|
|
|
|
|
|
|
| Carbondale Formation
|
formation
|
|
|
|
|
|
|
| Cardenas Basalt
|
formation
|
|
|
|
Nankoweap Formation
|
Dox Formation
|
|
| Cardenas Lava
|
formation
|
|
|
|
|
|
|
| Carey Formation
|
formation
|
|
|
|
|
|
|
| Carlile Formation
|
formation
|
|
|
|
Niobrara Formation
|
Greenhorn Limestone
|
|
| Carlin Canyon Formation
|
formation
|
|
|
|
|
|
|
| Carlin Formation
|
formation
|
|
|
|
|
|
|
| Carlisle Shale
|
formation
|
|
|
|
|
|
|
| Carmel Formation
|
formation
|
|
|
|
Entrada Sandstone
|
Navajo Sandstone
|
|
| Carney Lake Gneiss
|
formation
|
|
|
|
|
|
|
| Carpenter Ridge Tuff
|
formation
|
|
|
|
|
|
|
| Carrabassett Formation
|
formation
|
|
|
|
|
|
|
| Carrara Formation
|
formation
|
|
|
|
|
Zabriskie Quartzite
|
|
| Carrico Lake Formation
|
formation
|
|
|
|
|
|
|
| Carrizo Sand
|
formation
|
|
|
|
|
|
|
| Carson Desert Formation
|
formation
|
|
|
|
|
|
|
| Carters Limestone
|
formation
|
|
|
|
|
|
|
| Carterville Formation
|
formation
|
|
|
|
|
|
|
| Carthage Formation
|
formation
|
|
|
|
|
|
|
| Carwood Formation
|
formation
|
|
|
|
|
|
|
| Carys Mills Formation
|
formation
|
|
|
|
|
|
|
| Cascaden Ridge Formation
|
formation
|
|
|
|
|
|
|
| Caseyville Formation
|
formation
|
|
|
|
|
|
|
| Cashaqua Shale
|
formation
|
|
|
|
West Falls Group
|
|
|
| Cason Shale
|
formation
|
|
|
|
Brassfield Formation
|
Fernvale Limestone
|
|
| Casper Formation
|
formation
|
|
|
|
|
|
|
| Casselman Formation
|
formation
|
|
|
|
Monongahela Formation
|
Glenshaw Formation
|
|
| Cassville Shales
|
formation
|
|
|
|
|
|
|
| Castle Hayne Limestone
|
formation
|
|
|
|
|
|
|
| Castle Reef Dolomite
|
formation
|
|
|
|
|
|
|
| Castlegate Formation
|
formation
|
|
|
|
|
|
|
| Castlegate Sandstone
|
formation
|
|
|
|
|
|
|
| Catahoula Formation
|
formation
|
|
|
|
|
|
|
| Cataract Formation
|
formation
|
|
|
|
Salamonie Dolomite
|
Whitewater Formation
|
|
| Cataract Group
|
group
|
|
|
|
Dayton Formation
|
Cincinnati Group
|
|
| Catharpin Creek Formation
|
formation
|
|
|
|
|
|
|
| Cathedral Cliffs Formation
|
formation
|
|
|
|
|
|
|
| Cathedral Mountain Formation
|
formation
|
|
|
|
|
|
|
| Catheys Formation
|
formation
|
|
|
|
|
|
|
| Catlin Member
|
formation
|
|
|
|
Bullwhacker Member
|
|
|
| Catoctin Formation
|
formation
|
|
|
|
Weverton Formation
Chilhowee Group
|
Swift Run Formation
|
|
| Catskill Formation
|
formation
|
|
|
|
Rockwell Formation
|
Foreknobs Formation
|
|
| Cattaraugus Formation
|
formation
|
|
|
|
|
|
|
| Cave Valley Formation
|
formation
|
|
|
|
|
|
|
| Cayuta Formation
|
formation
|
|
|
|
|
|
|
| Cedar Mesa Sandstone
|
formation
|
|
|
|
Organ Rock Formation
|
Elephant Canyon Formation
|
|
| Cedar Mountain Formation
|
formation
|
|
|
|
Naturita Formation
|
Morrison Formation
|
|
| Cedar Valley Formation
|
formation
|
|
|
|
Lime Creek Formation
|
|
|
| Cedar Valley Group
|
formation
|
|
|
|
|
|
|
| Celta Formation
|
formation
|
|
|
|
|
|
|
| Centerfield Limestone
|
formation
|
|
|
|
|
|
|
| Central Valley Sandstone
|
formation
|
|
|
|
|
|
|
| Cerro Alto Limestone
|
formation
|
|
|
|
|
|
|
| Cerro Conejo Formation
|
formation
|
|
|
|
|
|
|
| Chadron Formation
|
formation
|
|
|
|
Brule Formation
|
|
|
| Chaffin Formation
|
formation
|
|
|
|
|
|
|
| Chainman Formation
|
formation
|
|
|
|
|
|
|
| Chainman Shale
|
formation
|
|
|
|
|
|
|
| Chalk Butte Formation
|
formation
|
|
|
|
|
|
|
| Chalk Hills Formation
|
formation
|
|
|
|
|
|
|
| Challis Volcanics
|
formation
|
|
|
|
|
|
|
| Chamberlain Shale
|
formation
|
|
|
|
|
|
|
| Chamberlain's Brook Formation
|
formation
|
|
|
|
Manuels River Formation
|
|
|
| Chambers Tuff
|
formation
|
|
|
|
|
|
|
| Chambersburg Formation
|
formation
|
|
|
|
|
|
|
| Chamita Formation
|
formation
|
|
|
|
|
|
|
| Champlain Clay
|
formation
|
|
|
|
|
|
|
| Chanac Formation
|
formation
|
|
|
|
Etchegoin Formation
|
Santa Margarita Formation
|
|
| Chandler Bridge Formation
|
formation
|
|
|
|
|
|
|
| Chandler Falls Formation
|
formation
|
|
|
|
|
|
|
| Chandler Ridge Formation
|
formation
|
|
|
|
|
|
|
| Chanute Formation
|
formation
|
|
|
|
|
|
|
| Chapin Formation
|
formation
|
|
|
|
|
|
|
| Chapin Peak Formation
|
formation
|
|
|
|
|
|
|
| Chapman Ranch Formation
|
formation
|
|
|
|
|
|
|
| Chapman Sandstone
|
formation
|
|
|
|
|
|
|
| Chappel Limestone
|
formation
|
|
|
|
|
|
|
| Charleston Sandstone
|
formation
|
|
|
|
|
|
|
| Chase Formation
|
formation
|
|
|
|
|
|
|
| Chase Group
|
formation
|
|
|
|
|
|
|
| Chatanooga Shale
|
formation
|
|
|
|
|
|
|
| Chatham Group
|
formation
|
|
|
|
Meriden Group
|
|
|
| Chatsworth Formation
|
formation
|
|
|
|
|
|
|
| Chattahoochee Formation
|
formation
|
|
|
|
|
|
|
| Chattanooga Shale
|
formation
|
|
|
|
|
unconformity
|
|
| Chaumont Formation
|
formation
|
|
|
|
|
|
|
| Cheeneetnuk Formation
|
formation
|
|
|
|
|
|
|
| Chemehuevi Formation
|
formation
|
|
|
|
|
|
|
| Chemung Formation
|
formation
|
|
|
|
|
|
|
| Chengwatana Volcanics
|
group
|
|
|
|
|
|
|
| Chepultepec Formation
|
formation
|
|
|
|
|
|
|
| Cherokee Group
|
group
|
|
|
|
Marmaton Group
|
Riverton Formation
|
|
| Cherokee Shale
|
formation
|
|
|
|
|
|
|
| Cherry Canyon Formation
|
formation
|
|
Guadalupian
|
Guadalupian
|
|
|
|
| Cherry Ridge Shale
|
formation
|
|
|
|
|
|
|
| Cherry Valley Formation
|
formation
|
|
|
|
|
|
|
| Cherryvale Formation
|
formation
|
|
|
|
|
|
|
| Cherryville Shale
|
formation
|
|
|
|
|
|
|
| Chesapeake Group
|
group
|
|
|
|
|
|
|
| Chesney Formation
|
formation
|
|
|
|
|
|
|
| Chester Formation
|
formation
|
|
|
|
|
|
|
| Chester Series
|
formation
|
|
|
|
|
|
|
| Cheyenne Sandstone
|
formation
|
|
|
|
|
|
|
| Chickahominy Formation
|
formation
|
|
|
|
|
|
|
| Chickaloon Formation
|
formation
|
|
|
|
|
|
|
| Chickamauga Formation
|
formation
|
|
|
|
|
|
|
| Chickasaw Creek Formation
|
formation
|
|
|
|
|
|
|
| Chickasaw Group
|
group
|
|
|
|
|
|
|
| Chickasawhay Formation
|
formation
|
|
|
|
|
|
|
| Chickasha Formation
|
formation
|
|
|
|
|
|
|
| Chickies Formation
|
formation
|
|
|
|
|
|
|
| Chico Formation
|
formation
|
|
|
|
Martinez Formation
|
Vaqueros Formation
|
|
| Chignik Formation
|
formation
|
|
|
|
|
|
|
| Chilhowee Group
|
group
|
|
|
|
Tomstown Dolomite
|
Catoctin Formation
|
|
| Chinitna Formation
|
formation
|
|
|
|
|
|
|
| Chinle Formation
|
formation
|
|
|
|
Aztec Sandstone
|
Moenkopi Formation
Cutler Formation
|
|
| Chipola Formation
|
formation
|
|
|
|
|
|
|
| Chisana Formation
|
formation
|
|
|
|
|
|
|
| Chisholm Formation
|
formation
|
|
|
|
|
|
|
| Chisholm Shale
|
formation
|
|
|
|
|
|
|
| Chisos Group
|
group
|
|
|
|
|
|
|
| Chispa Summit Formation
|
formation
|
|
|
|
|
|
|
| Chitistone Formation
|
formation
|
|
|
|
|
|
|
| Chititu Formation
|
formation
|
|
|
|
MacColl Ridge Formation
|
|
|
| Chiwapa Formation
|
formation
|
|
|
|
|
|
|
| Chloropagus Formation
|
formation
|
|
|
|
|
|
|
| Chocolay Group
|
group
|
|
|
|
|
|
|
| Choctawhatchee Formation
|
formation
|
|
|
|
|
|
|
| Chopawamsic Formation
|
formation
|
|
|
|
|
|
|
| Choptank Formation
|
formation
|
|
|
|
|
|
|
| Chouteau Formation
|
formation
|
|
|
|
|
|
|
| Chouteau Group
|
group
|
|
|
|
Fern Glen Formation
|
Chattanooga Shale
|
|
| Chowan River Formation
|
formation
|
|
|
|
|
|
|
| Choza Formation
|
formation
|
|
|
|
|
|
|
| Chrysler Formation
|
formation
|
|
|
|
|
|
|
| Chuar Group
|
formation
|
|
|
|
Sixtymile Formation
|
Nankoweap Formation
|
|
| Chugwater Formation
|
formation
|
|
|
|
Nugget Sandstone
|
Dinwoody Formation
|
|
| Cibao Marl
|
formation
|
|
|
|
|
|
|
| Cibolo Formation
|
formation
|
|
|
|
|
|
|
| Cid Formation
|
formation
|
|
|
|
|
|
|
| Cierbo Sandstone
|
formation
|
|
|
|
|
|
|
| Cimarron Ridge Formation
|
formation
|
|
|
|
|
|
|
| Cincinnati Group
|
group
|
|
|
|
Cataract Group
|
Point Pleasant Formation
|
|
| Cintura Formation
|
formation
|
|
|
|
|
|
|
| Cisco Group
|
group
|
|
|
|
|
|
|
| Citronelle Formation
|
formation
|
|
|
|
|
|
|
| Claggett Shale
|
formation
|
|
|
|
|
|
|
| Claiborne Formation
|
formation
|
|
|
|
|
|
|
| Clallam Formation
|
formation
|
|
|
|
|
|
|
| Claremont Shale
|
formation
|
|
|
|
|
|
|
| Clarendon Beds
|
formation
|
|
|
|
|
|
|
| Clarita Formation
|
formation
|
|
|
|
|
|
|
| Clarkia Formation
|
formation
|
|
|
|
|
|
|
| Clarno Formation
|
formation
|
|
|
|
John Day Formation
|
|
|
| Claron Formation
|
formation
|
|
|
|
|
|
|
| Clays Ferry Formation
|
formation
|
|
|
|
Garrard Siltstone
|
Lexington Limestone
|
|
| Clayton Formation
|
formation
|
|
|
|
Porters Creek Formation
|
|
|
| Clear Fork Formation
|
formation
|
|
|
|
|
|
|
| Clear Fork Group
|
formation
|
|
|
|
|
|
|
| Cliff House Sandstone
|
formation
|
|
|
|
|
|
|
| Cliffield Formation
|
formation
|
|
|
|
|
|
|
| Clifty Limestone
|
formation
|
|
|
|
Chattanooga Shale
|
Penters Chert
|
|
| Climbing Arrow Formation
|
formation
|
|
|
|
|
|
|
| Clinchfield Formation
|
formation
|
|
|
|
|
|
|
| Cline Shale
|
formation
|
|
|
|
|
|
|
| Clinton Formation
|
formation
|
|
|
|
Clinton Group
|
Medina Group
Thorold Sandstone
unconformity
|
|
| Clinton Group
|
group
|
|
|
|
Bloomsburg Formation
|
|
|
| Clore Formation
|
formation
|
|
|
|
Degonia Formation
|
Palestine Formation
|
|
| Clough Formation
|
formation
|
|
|
|
|
|
|
| Cloverly Formation
|
formation
|
|
|
|
Thermopolis Shale
|
Morrison Formation
|
|
| Cloyd Conglomerate
|
formation
|
|
|
|
|
|
|
| Clyde Formation
|
formation
|
|
|
|
|
|
|
| Coachman Formation
|
formation
|
|
|
|
|
|
|
| Coal Valley Formation
|
formation
|
|
|
|
Morgan Ranch Formation
|
Aldrich Station Formation
|
|
| Coaledo Formation
|
formation
|
|
|
|
|
|
|
| Coalmont Formation
|
formation
|
|
|
|
|
|
|
| Coamo Formation
|
formation
|
|
|
|
|
|
|
| Coast Range Ophiolite
|
formation
|
|
|
|
Franciscan Complex
|
|
|
| Cobleskill Formation
|
formation
|
|
|
|
|
|
|
| Cochise Formation
|
formation
|
|
|
|
|
|
|
| Cockeysville Marble
|
formation
|
|
|
|
Wissahickon Formation
|
|
|
| Cockfield Formation
|
formation
|
|
|
|
Moodys Branch Formation
|
Cook Mountain Formation
|
|
| Coconino Sandstone
|
formation
|
|
|
|
Toroweap Formation
|
Hermit Formation
|
|
| Cody Shale
|
formation
|
|
|
|
Mesaverde Formation
|
Frontier Formation
|
|
| Coetas Formation
|
formation
|
|
|
|
|
|
|
| Coeymans Limestone
|
formation
|
|
|
|
Kalkberg Limestone
|
Manlius Formation
|
|
| Coffee Mill Butte Beds
|
formation
|
|
|
|
|
|
|
| Coffee Mill Hammock Formation
|
formation
|
|
|
|
|
|
|
| Coffee Sand
|
formation
|
|
|
|
|
|
|
| Coffeyville Formation
|
formation
|
|
|
|
|
|
|
| Coils Creek Limestone
|
formation
|
|
|
|
Denay Limestone
|
Bartine Member
|
|
| Cokedale Formation
|
formation
|
|
|
|
|
|
|
| Coldwater Sandstone
|
formation
|
|
|
|
Sespe Formation
|
Cozy Dell Shale
|
|
| Coldwater Shale
|
formation
|
|
|
|
Marshall Sandstone
|
Sunbury Shale
|
|
| Coleman Junction Formation
|
formation
|
|
|
|
|
|
|
| Coleraine Formation
|
formation
|
|
|
|
|
|
|
| Colina Formation
|
formation
|
|
|
|
|
|
|
| Collazo Shale
|
formation
|
|
|
|
|
|
|
| Collier Shale
|
formation
|
|
|
|
Crystal Mountain Sandstone
|
|
|
| Collingwood Shale
|
formation
|
|
|
|
Bill's Creek Shale
|
Trenton Limestone
|
|
| Collinsville Formation
|
formation
|
|
|
|
|
|
|
| Colmena Tuff
|
formation
|
|
|
|
|
|
|
| Colorado City Formation
|
formation
|
|
|
|
|
Camp Springs Formation
|
|
| Colter Formation
|
formation
|
|
|
|
|
|
|
| Colton Formation
|
formation
|
|
|
|
|
|
|
| Columbia River Basalt Group
|
large igneous province
group
|
|
|
|
|
John Day Formation
|
|
| Columbus Limestone
|
formation
|
|
|
|
Bass Islands Group
|
Lucas Formation
|
|
| Colville Group
|
formation
|
|
|
|
|
|
|
| Comanche Formation
|
formation
|
|
|
|
|
|
|
| Comanche Group
|
formation
|
|
|
|
|
|
|
| Comanche Peak Limestone
|
formation
|
|
|
|
Edwards Group
|
Walnut Formation
|
|
| Comox Formation
|
formation
|
|
|
|
Haslam Formation
|
|
|
| Compton Limestone
|
formation
|
|
|
|
Northview Formation
|
Cotter Formation
|
|
| Comus Formation
|
formation
|
|
|
|
|
|
|
| Conanicut Group
|
group
|
|
|
|
|
|
|
| Conasauga Formation
|
formation
|
|
|
|
Copper Ridge Dolomite
|
Rome Formation
|
|
| Conasauga Group
|
group
|
|
|
|
Copper Ridge Dolomite
|
Rome Group
|
|
| Concepcion Formation
|
formation
|
|
|
|
|
|
|
| Concha Formation
|
formation
|
|
|
|
|
|
|
| Condor Canyon Formation
|
formation
|
|
|
|
|
|
|
| Conemaugh Formation
|
formation
|
|
|
|
|
|
|
| Conemaugh Group
|
group
|
|
|
|
Monongahela Group
|
Allegheny Formation
|
|
| Conesauga Formation
|
formation
|
|
|
|
|
|
|
| Conestoga Formation
|
formation
|
|
|
|
|
Vintage Dolomite
|
|
| Conglomerate Mesa Formation
|
formation
|
|
|
|
|
|
|
| Congress Canyon Formation
|
formation
|
|
|
|
|
|
|
| Connelly Conglomerate
|
formation
|
|
|
|
|
|
|
| Conococheague Formation
|
formation
|
|
|
|
Beekmantown Dolomite
|
Elbrook Formation
|
|
| Contadero Formation
|
formation
|
|
|
|
|
|
|
| Cook Mountain Formation
|
formation
|
|
|
|
Cockfield Formation
|
|
|
| Cook Ranch Formation
|
formation
|
|
|
|
|
|
|
| Cooks Formation
|
formation
|
|
|
|
|
|
|
| Coon Creek Formation
|
formation
|
|
|
|
|
|
|
| Coon Hollow Formation
|
formation
|
|
|
|
|
|
|
| Cooper Canyon Formation
|
formation
|
|
|
|
Redonda Formation
|
Trujillo Formation
|
|
| Cooper Group
|
group
|
|
|
|
|
|
|
| Coosawhatchie Formation
|
formation
|
|
|
|
|
|
|
| Copenhagen Formation
|
formation
|
|
|
|
Eureka Quartzite
|
Pogonip Group
|
|
| Copland Coal
|
formation
|
|
|
|
|
|
|
| Copper Canyon Formation
|
formation
|
|
|
|
|
|
|
| Copper Harbor Conglomerate
|
formation
|
|
|
|
Nonesuch Shale
|
|
|
| Copper Ridge Dolomite
|
formation
|
|
|
|
Beekmantown Dolomite
|
Conasauga Group
Conasauga Formation
|
|
| Coralville Formation
|
formation
|
|
|
|
|
|
|
| Corbin Ranch Formation
|
formation
|
|
|
|
|
|
|
| Cordell Formation
|
formation
|
|
|
|
Rockview Formation
|
Schoolcraft Formation
|
|
| Cornfield Springs Formation
|
formation
|
|
|
|
|
|
|
| Corniferous Formation
|
formation
|
|
|
|
|
|
|
| Corniferous Limestone
|
formation
|
|
|
|
|
|
|
| Cornwallis Limestone
|
formation
|
|
|
|
|
|
|
| Coronados Volcanics
|
formation
|
|
|
|
|
|
|
| Corryville Formation
|
formation
|
|
|
|
|
|
|
| Corset Spring Shale
|
formation
|
|
|
|
|
|
|
| Corsicana Marl
|
formation
|
|
|
|
|
|
|
| Corwin Formation
|
formation
|
|
|
|
|
|
|
| Coso Formation
|
formation
|
|
|
|
|
|
|
| Cotter Formation
|
formation
|
|
|
|
Powell Formation
|
Jefferson City Formation
|
|
| Cotton Valley Group
|
group
|
|
|
|
|
|
|
| Cottonwood Formation
|
formation
|
|
|
|
|
|
|
| Cottonwood Limestone
|
formation
|
|
|
|
Florena Shale
|
Eskridge Shale
|
|
| Cottonwood Wash Formation
|
formation
|
|
|
|
|
|
|
| Cotui Limestone
|
formation
|
|
|
|
|
|
|
| Council Grove Group
|
formation
|
|
|
|
|
|
|
| Cove Creek Limestone
|
formation
|
|
|
|
|
|
|
| Cow Branch Formation
|
formation
|
|
|
|
|
|
|
| Cow Creek Limestone
|
formation
|
|
|
|
|
|
|
| Cow Hollow Bed
|
bed
|
|
|
|
|
|
|
| Cowlitz Formation
|
formation
|
|
|
|
|
|
|
| Coyote Butte Formation
|
formation
|
|
|
|
|
|
|
| Coyote Butte Limestone
|
formation
|
|
|
|
|
|
|
| Cozy Dell Shale
|
formation
|
|
|
|
Coldwater Sandstone
|
Matilija Sandstone
|
|
| Crab Orchard Formation
|
formation
|
|
|
|
Bisher Formation
|
Brassfield Formation
|
|
| Crab Orchard Mountains Formation
|
formation
|
|
|
|
|
|
|
| Crab Orchard Mountains Group
|
formation
|
|
|
|
|
|
|
| Crack Canyon Formation
|
formation
|
|
|
|
|
|
|
| Crater Flat Group
|
group
|
|
|
|
|
|
|
| Craven Creek Bed
|
bed
|
|
|
|
|
|
|
| Creede Formation
|
formation
|
|
|
|
|
|
|
| Crescent Formation
|
formation
|
|
|
|
|
|
|
| Crescent Hill Basalt
|
formation
|
|
|
|
|
|
|
| Crevasse Canyon Formation
|
formation
|
|
|
|
Point Lookout Sandstone
|
|
|
| Crevasse Caynon Formation
|
formation
|
|
|
|
|
|
|
| Croatan Formation
|
formation
|
|
|
|
|
|
|
| Crockett Formation
|
formation
|
|
|
|
|
|
|
| Crooked Creek Formation
|
formation
|
|
|
|
|
|
|
| Cross Formation
|
formation
|
|
|
|
|
|
|
| Crosswicks Clay
|
formation
|
|
|
|
|
|
|
| Crouse Formation
|
formation
|
|
|
|
|
|
|
| Crow Mountain Formation
|
formation
|
|
|
|
|
|
|
| Crowder Formation
|
formation
|
|
|
|
Harold Formation
|
Punchbowl Formation
|
|
| Crowley Lake Stone Columns
|
tourist attraction
formation
|
|
|
|
|
|
|
| Crown Point Formation
|
formation
|
|
|
|
|
|
|
| Crystal Mountain Sandstone
|
formation
|
|
|
|
Mazarn Shale
|
Collier Shale
|
|
| Crystal Peak Dolomite
|
formation
|
|
|
|
|
|
|
| Crystal River Limestone
|
formation
|
|
|
|
|
|
|
| Crystal Spring Formation
|
formation
|
|
|
|
Beck Spring Dolomite
|
|
|
| Cub Mountain Formation
|
formation
|
|
|
|
|
|
|
| Cuba Formation
|
formation
|
|
|
|
|
|
|
| Cuchara Formation
|
formation
|
|
|
|
|
|
|
| Cuchillo Formation
|
formation
|
|
|
|
Benigno Limestone
|
Las Vigas Formation
|
|
| Cuchillo Negro Formation
|
formation
|
|
|
|
|
|
|
| Cudahy Camp Formation
|
formation
|
|
|
|
|
|
|
| Cuerbio Basalt
|
formation
|
|
|
|
|
|
|
| Cuevas Limestone
|
formation
|
|
|
|
|
|
|
| Culpeper Group
|
group
|
|
|
|
|
|
|
| Cumberland Formation
|
formation
|
|
|
|
Chattanooga Shale
|
Leipers Limestone
|
|
| Cummingsville Formation
|
formation
|
|
|
|
|
Decorah Shale
|
|
| Cumnock Formation
|
formation
|
|
|
|
|
|
|
| Curtis Formation
|
formation
|
|
|
|
|
|
|
| Cussewago Formation
|
formation
|
|
|
|
|
|
|
| Cussewago Sandstone
|
formation
|
|
|
|
Bedford Shale
|
Ohio Shale
|
|
| Cutler Formation
|
formation
group
|
|
|
|
Chinle Formation
|
Hermosa Formation
|
|
| Cutoff Formation
|
formation
|
|
|
|
|
|
|
| Cutter Dolomite
|
formation
|
|
|
|
|
|
|
| Cuyahoga Formation
|
formation
|
|
|
|
Logan Formation
|
Sunbury Shale
|
|
| Cuyama Formation
|
formation
|
|
|
|
|
|
|
| Cuyón Formation
|
formation
|
|
|
|
|
|
|
| Cynthia Falls Sandstone
|
formation
|
|
|
|
|
|
|
| Cypress Formation
|
formation
|
|
|
|
Beech Creek Limestone
|
Reelsville Limestone
|
|
| Daguao Formation
|
formation
|
|
|
|
|
|
|
| Dake Quartzite
|
formation
|
|
|
|
|
|
|
| Dakota Formation
|
formation
|
|
|
|
Graneros Shale
Colorado Group
|
Morrison Formation
|
|
| Dakota Group
|
group
|
|
|
|
|
|
|
| Dalles Formation
|
formation
|
|
|
|
|
|
|
| Dalton Sandstone
|
formation
|
|
|
|
|
|
|
| Danville Landing Formation
|
formation
|
|
|
|
|
|
|
| Darrough Felsite
|
formation
|
|
|
|
|
|
|
| Darwin Canyon Formation
|
formation
|
|
|
|
|
|
|
| Davis Creek Schist
|
formation
|
|
|
|
|
|
|
| Davis Formation
|
formation
|
|
|
|
Derby-Doerun Dolomite
|
Bonneterre Formation
|
|
| Davis Spring Formation
|
formation
|
|
|
|
Kinkead Spring Limestone
|
|
|
| Dawn Limestone
|
formation
|
|
|
|
|
|
|
| Day Point Formation
|
formation
|
|
|
|
|
|
|
| Daylight Formation
|
formation
|
|
|
|
|
|
|
| Days Creek Formation
|
formation
|
|
|
|
|
|
|
| Dayton Formation
|
formation
|
|
|
|
Osgood Formation
|
Brassfield Formation
|
|
| De Chelly Sandstone
|
formation
|
|
|
|
|
White Rim Sandstone
|
|
| De Queen Formation
|
formation
|
|
|
|
|
|
|
| DeBeque Formation
|
formation
|
|
|
|
|
|
|
| DeQueen Formation
|
formation
|
|
|
|
|
|
|
| Deadman Limestone
|
formation
|
|
|
|
|
|
|
| Dearborne Limestone
|
formation
|
|
|
|
|
|
|
| Debris Dam Formation
|
formation
|
|
|
|
|
|
|
| Decatur Limestone
|
formation
|
|
|
|
|
|
|
| Decker Formation
|
formation
|
|
|
|
|
|
|
| Decorah Shale
|
formation
|
|
|
|
Galena Group
|
Platteville Limestone
|
|
| Deep Creek Formation
|
formation
|
|
|
|
|
|
|
| Deep River Formation
|
formation
|
|
|
|
|
|
|
| Deep Spring Formation
|
formation
|
|
|
|
Campito Formation
|
|
|
| Deepkill Shale
|
formation
|
|
|
|
|
|
|
| Deer Butte Formation
|
formation
|
|
|
|
|
|
|
| Deer Creek Formation
|
formation
|
|
|
|
|
|
|
| Deer Creek Limestone
|
formation
|
|
|
|
|
|
|
| Deer Trail Group
|
group
|
|
|
|
|
|
|
| Deese Group
|
formation
|
|
|
|
|
|
|
| Degonia Formation
|
formation
|
|
|
|
Kinkaid Limestone
|
Clore Formation
|
|
| Deguynos Formation
|
formation
|
|
|
|
|
|
|
| Dekkas Formation
|
formation
|
|
|
|
|
|
|
| Del Norte Formation
|
formation
|
|
|
|
|
|
|
| Del Rio Clay
|
formation
|
|
|
|
|
|
|
| Del Rio Formation
|
formation
|
|
|
|
Buda Limestone
|
Georgetown Formation
|
|
| Delaho Formation
|
formation
|
|
|
|
|
|
|
| Delaware Limestone
|
formation
|
|
|
|
Olentangy Shale
|
Columbus Limestone
|
|
| Delaware Mountain Formation
|
formation
|
|
|
|
|
|
|
| Delaware Mountain Group
|
group
|
|
|
|
|
|
|
| Delaware River Flags
|
formation
|
|
|
|
|
|
|
| Delaware River Formation
|
formation
|
|
|
|
|
|
|
| Dell Beds Formation
|
formation
|
|
|
|
|
|
|
| Dellvale Ash Bed
|
formation
|
|
|
|
|
|
|
| Delmar Formation
|
formation
|
|
|
|
|
|
|
| Delphi Formation
|
formation
|
|
|
|
|
|
|
| Demopolis Chalk Formation
|
formation
|
|
|
|
Ripley Formation
|
Mooreville Chalk Formation
|
|
| Denay Limestone
|
formation
|
|
|
|
|
|
|
| Denison Formation
|
formation
|
|
|
|
|
|
|
| Denley Limestone
|
formation
|
|
|
|
|
|
|
| Dennis Formation
|
formation
|
|
|
|
|
|
|
| Denton Formation
|
formation
|
|
|
|
|
|
|
| Denver Formation
|
formation
|
|
|
|
Dawson Arkose
|
Arapahoe Formation
|
|
| Depot Mountain formation
|
formation
|
|
|
|
|
|
|
| Derby-Doerun Dolomite
|
formation
|
|
|
|
Potosi Formation
|
Davis Formation
|
|
| Des Moines Formation
|
formation
|
|
|
|
|
|
|
| Descon Formation
|
formation
|
|
|
|
|
|
|
| Deseret Limestone
|
formation
|
|
|
|
|
|
|
| Desert Peak Formation
|
formation
|
|
|
|
|
|
|
| Desert Range Limestone
|
formation
|
|
|
|
|
Jangle Limestone
|
|
| Detroit River Group
|
formation
|
|
|
|
Dundee Formation
|
Holland Quarry Shale
|
|
| Devil's Graveyard Formation
|
formation
|
|
|
|
|
|
|
| Devil's Slide
|
formation
|
|
|
|
|
|
|
| Devils Gate Limestone
|
formation
|
|
|
|
|
|
|
| Devils Hole Sandstone
|
formation
|
|
|
|
Grimsby Formation
|
Power Glen Shale
|
|
| Devils River Limestone
|
formation
|
|
|
|
|
|
|
| Dewey Formation
|
formation
|
|
|
|
|
|
|
| Diablo Formation
|
formation
|
|
|
|
|
|
|
| Diamond Peak Formation
|
formation
|
|
|
|
Ely Limestone
|
|
|
| Diamond Trail Formation
|
formation
|
|
|
|
|
|
|
| Dibekulewe Bed
|
formation
|
|
|
|
|
|
|
| Dierks Limestone
|
formation
|
|
|
|
|
|
|
| Digdeguash Formation
|
formation
|
|
|
|
|
|
|
| Dighton Conglomerate
|
formation
|
|
|
|
|
|
|
| Diligencia Formation
|
formation
|
|
|
|
|
|
|
| Dillsboro Formation
|
formation
|
|
|
|
Whitewater Formation
|
Kope Formation
|
|
| Dimple Limestone
|
formation
|
|
|
|
Haymond Formation
|
Tesnus Formation
|
|
| Dinwoody Formation
|
formation
|
|
|
|
|
|
|
| Disaster Peak Formation
|
formation
|
|
|
|
|
|
|
| Dixie Valley Formation
|
formation
|
|
|
|
|
|
|
| Dockum Group
|
group
|
|
|
|
|
|
|
| Dodgeville Facies
|
formation
|
|
|
|
|
|
|
| Dog Creek Formation
|
formation
|
|
|
|
|
|
|
| Dolgeville Formation
|
formation
|
|
|
|
|
|
|
| Dollarhide Formation
|
formation
|
|
|
|
|
|
|
| Domengine Formation
|
formation
|
|
|
|
|
|
|
| Donoho Creek Formation
|
formation
|
|
|
|
|
|
|
| Dornick Hills Group
|
formation
|
|
|
|
|
|
|
| Dotham Formation
|
formation
|
|
|
|
|
|
|
| Dotsero Formation
|
formation
|
|
|
|
|
|
|
| Doughnut Formation
|
formation
|
|
|
|
|
|
|
| Douglas Canyon Formation
|
formation
|
|
|
|
|
|
|
| Douglas Group
|
formation
|
|
|
|
|
|
|
| Dove Spring Formation
|
formation
|
|
|
|
|
|
|
| Dover Formation
|
formation
|
|
|
|
|
|
|
| Dox Formation
|
formation
|
|
|
|
Cardenas Basalt
|
Shinumo Quartzite
|
|
| Drake Bay Formation
|
formation
|
|
|
|
|
|
|
| Drakes Bay Formation
|
formation
|
|
|
|
|
|
|
| Drakes Formation
|
formation
|
|
|
|
Brassfield Formation
|
Ashlock Formation
|
|
| Dresbach Formation
|
formation
|
|
|
|
|
|
|
| Drewsey Formation
|
formation
|
|
|
|
|
|
|
| Dripping Spring Quartzite
|
formation
|
|
|
|
|
|
|
| Drowning Creek Formation
|
formation
|
|
|
|
Estill Shale
|
Drakes Formation
|
|
| Drum Formation
|
formation
|
|
|
|
|
|
|
| Drurey Shale
|
formation
|
|
|
|
|
|
|
| Dry Canyon Sandstone Member
|
formation
|
|
|
|
|
|
|
| Dry Creek Shale
|
formation
|
|
|
|
|
|
|
| Drywood Formation
|
formation
|
|
|
|
|
Rowe Formation
|
|
| DuNoir Limestone
|
formation
|
|
|
|
|
|
|
| Dubuque Formation
|
formation
|
|
|
|
Maquoketa Formation
|
Galena Group
|
|
| Duchesne River Formation
|
formation
|
|
|
|
|
|
|
| Duck Creek Formation
|
formation
|
|
|
|
|
|
|
| Dugger Formation
|
formation
|
|
|
|
Shelburn Formation
|
Petersburg Formation
|
|
| Dun Glen Formation
|
formation
|
|
|
|
|
|
|
| Dunbar Creek Formation
|
formation
|
|
|
|
|
|
|
| Duncan Formation
|
formation
|
|
|
|
|
|
|
| Dunderberg Shale
|
formation
|
|
|
|
Windfall Formation
|
|
|
| Dunkirk Formation
|
formation
|
|
|
|
|
|
|
| Dunlap Formation
|
formation
|
|
|
|
|
|
|
| Dunleith Formation
|
formation
|
|
|
|
|
|
|
| Duperow Formation
|
formation
|
|
|
|
|
|
|
| Duplin Formation
|
formation
|
|
|
|
|
|
|
| Duplin Marl
|
formation
|
|
|
|
|
|
|
| Duquense Coal
|
formation
|
|
|
|
|
|
|
| Duquesne Coal
|
formation
|
|
|
|
|
|
|
| Dutch Island Harbor Formation
|
formation
|
|
|
|
|
|
|
| Dutchtown Formation
|
formation
|
|
|
|
Joachim Dolomite
|
St. Peter Sandstone
|
|
| Dyer Formation
|
formation
|
|
|
|
|
|
|
| Eagle Creek Formation
|
formation
|
|
|
|
|
|
|
| Eagle Ford Group
|
group
|
|
|
|
Austin Chalk
|
Woodbine Formation
|
|
| Eagle Formation
|
formation
|
|
|
|
|
|
|
| Eagle Mountain Shale Member
|
formation
|
|
|
|
Thimble Limestone
|
|
|
| Eagle Sandstone
|
formation
|
|
|
|
Claggett Shale
|
Telegraph Creek Formation
|
|
| Earp Formation
|
formation
|
|
|
|
|
|
|
| East Berlin Formation
|
formation
|
|
|
|
|
|
|
| East Mountain Shale
|
formation
|
|
|
|
|
|
|
| East Passage Formation
|
formation
|
|
|
|
|
|
|
| Eastover Formation
|
formation
|
|
|
|
|
|
|
| Eau Claire Formation
|
formation
|
|
|
|
Davis Formation
|
Mount Simon Sandstone
|
|
| Echo Canyon Conglomerate
|
formation
|
|
|
|
|
|
|
| Echo Shale
|
formation
|
|
|
|
Gold Ace Limestone
|
Thimble Limestone
|
|
| Echooka Formation
|
formation
|
|
|
|
|
|
|
| Ector Chalk
|
formation
|
|
|
|
|
|
|
| Edinburgh Formation
|
formation
|
|
|
|
|
|
|
| Edith Formation
|
formation
|
|
|
|
|
|
|
| Edna Mountain Formation
|
formation
|
|
|
|
|
|
|
| Edwards Formation
|
formation
|
|
|
|
|
|
|
| Edwards Group
|
formation
|
|
|
|
|
|
|
| Edwardsville Formation
|
formation
|
|
|
|
Muldraugh Formation
|
Spickert Knob Formation
|
|
| Edwardsville Limestone
|
formation
|
|
|
|
|
|
|
| Eek Mountain Formation
|
formation
|
|
|
|
|
|
|
| Eetza Formation
|
formation
|
|
|
|
|
|
|
| Eggleston Formation
|
formation
|
|
|
|
|
|
|
| Eiss Formation
|
formation
|
|
|
|
|
|
|
| El Cobre Canyon Formation
|
formation
|
|
|
|
|
|
|
| El Paso Formation
|
formation
|
|
|
|
|
|
|
| El Paso Group
|
formation
|
|
|
|
|
|
|
| El Picacho Formation
|
formation
|
|
Cretaceous
|
Cretaceous
|
|
|
|
| El Rayo Formation
|
formation
|
|
|
|
|
|
|
| El Reno Group
|
formation
|
|
|
|
|
|
|
| Elbert Formation
|
formation
|
|
|
|
|
|
|
| Elbrook Formation
|
formation
|
|
|
|
Conococheague Formation
|
Waynesboro Formation
|
|
| Eleana Formation
|
formation
|
|
|
|
|
|
|
| Elephant Butte Formation
|
formation
|
|
|
|
|
|
|
| Elephant Canyon Formation
|
formation
|
|
|
|
Cedar Mesa Sandstone
|
Halgaito Member
|
|
| Elgin Formation
|
formation
|
|
|
|
|
|
|
| Eli Formation
|
formation
|
|
|
|
|
|
|
| Elk River Formation
|
formation
|
|
|
|
|
|
|
| Elkhead Limestone
|
formation
|
|
|
|
|
|
|
| Elkhorn Formation
|
formation
|
|
|
|
|
|
|
| Elko Formation
|
formation
|
|
|
|
|
|
|
| Elko Shales
|
formation
|
|
|
|
|
|
|
| Ellenburger Group
|
formation
|
|
|
|
|
|
|
| Ellensburg Formation
|
formation
|
|
|
|
|
|
|
| Ellicott City Granodiorite
|
formation
|
|
|
|
|
|
|
| Ellicott Formation
|
formation
|
|
|
|
|
|
|
| Ellis Formation
|
formation
|
|
|
|
|
|
|
| Ellis Group
|
formation
|
|
|
|
Mannville Group
|
Rundle Group
|
|
| Ellsworth Shale
|
formation
|
|
|
|
Sunbury Shale
|
Antrim Shale
|
|
| Elmdale Formation
|
formation
|
|
|
|
|
|
|
| Elvins Group
|
formation
|
|
|
|
Potosi Formation
|
Bonneterre Formation
|
|
| Elwren Formation
|
formation
|
|
|
|
Beech Creek Limestone
|
Reelsville Limestone
|
|
| Ely Limestone
|
formation
|
|
|
|
|
Diamond Peak Formation
|
|
| Ely Springs Dolomite
|
formation
|
|
|
|
Hidden Valley Dolomite
|
Johnson Spring Formation
|
|
| Emigrant Formation
|
formation
|
|
|
|
|
|
|
| Emigrant Springs Formation
|
formation
|
|
|
|
|
|
|
| Eminence Formation
|
formation
|
|
|
|
|
Potosi Formation
|
|
| Empire Formation
|
formation
|
|
|
|
|
|
|
| Emporia Formation
|
formation
|
|
|
|
|
|
|
| Enfield Formation
|
formation
|
|
|
|
|
|
|
| Engelmann Formation
|
formation
|
|
|
|
|
|
|
| English River Formation
|
formation
|
|
|
|
|
|
|
| Englishtown Formation
|
formation
|
|
|
|
Marshalltown Formation
|
Woodbury Formation
|
|
| Enid Formation
|
formation
|
|
|
|
|
|
|
| Entrada Sandstone
|
formation
|
|
|
|
|
|
|
| Epitaph Formation
|
formation
|
|
|
|
|
|
|
| Eramosa Formation
|
formation
|
|
|
|
|
|
|
| Erda Formation
|
formation
|
|
|
|
|
|
|
| Ericson Formation
|
formation
|
|
|
|
|
|
|
| Erving Formation
|
formation
|
|
|
|
|
|
|
| Escabrosa Group
|
group
|
|
|
|
|
|
|
| Escabrosa Limestone
|
formation
|
|
|
|
|
|
|
| Escondido Formation
|
formation
|
|
|
|
|
|
|
| Eskridge Shale
|
formation
|
|
|
|
Beattie Limestone
Cottonwood Limestone
|
|
|
| Esmeralda Formation
|
formation
|
|
|
|
|
|
|
| Esopus Formation
|
formation
|
|
|
|
|
|
|
| Espada Formation
|
formation
|
|
|
|
Jalama Formation
|
|
|
| Esplanade Sandstone
|
formation
|
|
|
|
Hermit Formation
|
Wescogame Formation
|
|
| Estill Shale
|
formation
|
|
|
|
Bisher Formation
|
Drowning Creek Formation
|
|
| Etchegoin Formation
|
formation
|
|
|
|
San Joaquin Formation
|
Antelope Shale
|
|
| Etivluk Group
|
group
|
|
|
|
|
|
|
| Eugene Formation
|
formation
|
|
|
|
|
|
|
| Eureka Quartzite
|
formation
|
|
|
|
Hanson Creek Formation
|
Copenhagen Formation
|
|
| Eureka Valley Tuff
|
formation
|
|
|
|
|
|
|
| Eutaw Formation
|
formation
|
|
|
|
Austin Group
|
Tuscaloosa Formation
|
|
| Evacuation Creek Formation
|
formation
|
|
|
|
|
|
|
| Evanston Formation
|
formation
|
|
|
|
|
|
|
| Everton Formation
|
formation
|
|
|
|
St. Peter Sandstone
|
Powell Formation
|
|
| Excello Shale
|
formation
|
|
|
|
|
|
|
| Excelsior Formation
|
formation
|
|
|
|
|
|
|
| Exshaw Formation
|
formation
|
|
|
|
Banff Formation
|
Wabamun Formation
|
|
| Fairview Formation
|
formation
|
|
|
|
Grant Lake Formation
|
Kope Formation
|
|
| Fajardo Formation
|
formation
|
|
|
|
|
|
|
| Fall River Sandstone
|
formation
|
|
|
|
|
|
|
| Falling Creek Formation
|
formation
|
|
|
|
|
|
|
| Fallon Formation
|
formation
|
|
|
|
|
|
|
| Falls City Formation
|
formation
|
|
|
|
|
|
|
| Falls City Limestone
|
formation
|
|
|
|
|
|
|
| Falls Creek Gneiss
|
formation
|
|
|
|
|
|
|
| Falor Formation
|
formation
|
|
|
|
|
|
|
| Farisita Formation
|
formation
|
|
|
|
|
|
|
| Farrer Formation
|
formation
|
|
|
|
|
|
|
| Favret Formation
|
formation
|
|
|
|
|
|
|
| Fayette Sandstone
|
formation
|
|
|
|
|
|
|
| Fayetteville Shale
|
formation
|
|
|
|
Pitkin Formation
|
|
|
| Feldt Ranch Beds
|
bed
|
|
|
|
|
|
|
| Feltville Formation
|
formation
|
|
|
|
|
|
|
| Fenstermaker Wash Formation
|
formation
|
|
|
|
|
|
|
| Ferguson Mountain Formation
|
formation
|
|
|
|
|
|
|
| Fern Creek Formation
|
formation
|
|
|
|
|
|
|
| Fern Glen Formation
|
formation
|
|
|
|
Burlington Limestone
|
Chouteau Group
|
|
| Fernando Formation
|
formation
|
|
|
|
Pico Formation
|
Repetto Formation
|
|
| Fernvale Limestone
|
formation
|
|
|
|
Cason Shale
|
Kimmswick Limestone
|
|
| Ferris Formation
|
formation
|
|
|
|
Hanna Formation
|
Medicine Bow Formation
|
|
| Ferron Point Formation
|
formation
|
|
|
|
Long Lake Limestone
|
Rockport Quarry Limestone
|
|
| Ferron Sandstone Member
|
formation
|
|
|
|
|
|
|
| Fido Sandstone
|
formation
|
|
|
|
|
|
|
| Fields Creek Formation
|
formation
|
|
|
|
|
|
|
| Figuera Lava
|
formation
|
|
|
|
|
|
|
| Fillmore Limestone
|
formation
|
|
|
|
|
|
|
| Finlay Formation
|
formation
|
|
|
|
|
|
|
| Finlay Limestone
|
formation
|
|
|
|
|
Lagrima Formation
|
|
| Firehole Bed
|
bed
|
|
|
|
|
|
|
| Fish Canyon Tuff
|
formation
|
|
|
|
|
|
|
| Fish Haven Dolomite
|
formation
|
|
|
|
Laketown Dolomite
|
Eureka Quartzite
|
|
| Fisher Quartz Latite
|
formation
|
|
|
|
|
|
|
| Fitchville Formation
|
formation
|
|
|
|
|
|
|
| Fite Limestone
|
formation
|
|
|
|
|
|
|
| Fite Ranch Sandstone
|
formation
|
|
|
|
|
|
|
| Fitz Creek Siltstone
|
formation
|
|
|
|
|
|
|
| Flagstaff Formation
|
formation
|
|
|
|
|
|
|
| Flanner Beach Formation
|
formation
|
|
|
|
|
|
|
| Flaxville Gravels
|
formation
|
|
|
|
|
|
|
| Flechado Formation
|
formation
|
|
|
|
|
|
|
| Fleming Formation
|
formation
|
|
|
|
|
|
|
| Flint River Formation
|
formation
|
|
|
|
|
|
|
| Florena Shale
|
formation
|
|
|
|
Morrill Limestone
|
Cottonwood Limestone
|
|
| Florida Formation
|
formation
|
|
|
|
|
|
|
| Flour Island Formation
|
formation
|
|
|
|
|
|
|
| Flournoy Formation
|
formation
|
|
|
|
|
|
|
| Flowerpot Formation
|
formation
|
|
|
|
|
|
|
| Floyd Shale
|
formation
|
|
|
|
|
|
|
| Fond Du Lac Formation
|
formation
|
|
|
|
|
|
|
| Foraker Limestone
|
formation
|
|
|
|
|
|
|
| Forbes Formation
|
formation
|
|
|
|
|
|
|
| Forbes Shale
|
formation
|
|
|
|
|
Funks Shale
|
|
| Foreknobs Formation
|
formation
|
|
|
|
Catskill Formation
|
Scherr Formation
|
|
| Foreman Formation
|
formation
|
|
|
|
|
|
|
| Forest Hill Formation
|
formation
|
|
|
|
|
|
|
| Fort Ann Formation
|
formation
|
|
|
|
|
|
|
| Fort Apache Formation
|
formation
|
|
|
|
|
|
|
| Fort Atkinson Formation
|
formation
|
|
|
|
|
|
|
| Fort Atkinson Limestone
|
formation
|
|
|
|
Brainard Shale
|
Scales Shale
|
|
| Fort Burnside Formation
|
formation
|
|
|
|
|
|
|
| Fort Cassin Formation
|
formation
|
|
|
|
|
|
|
| Fort Crittenden Formation
|
formation
|
|
|
|
Salero Formation
|
|
|
| Fort Gaines Formation
|
formation
|
|
|
|
|
|
|
| Fort Hancock Formation
|
formation
|
|
|
|
|
|
|
| Fort Payne Chert
|
formation
|
|
|
|
|
|
|
| Fort Payne Formation
|
formation
|
|
|
|
|
Maccrady Formation
|
|
| Fort Peña Formation
|
formation
|
|
|
|
|
|
|
| Fort Pillow Sand
|
formation
|
|
|
|
|
|
|
| Fort Preston Sand
|
formation
|
|
|
|
|
|
|
| Fort Randall Formation
|
formation
|
|
|
|
|
|
|
| Fort Riley Formation
|
formation
|
|
|
|
|
|
|
| Fort Scott Formation
|
formation
|
|
|
|
|
|
|
| Fort Scott Limestone
|
formation
|
|
|
|
|
|
|
| Fort Terrett Formation
|
formation
|
|
|
|
|
|
|
| Fort Thompson Formation
|
formation
|
|
|
|
|
|
|
| Fort Union Formation
|
formation
|
|
|
|
|
Hell Creek Formation
Tanis
|
|
| Fort Union Group
|
group
|
|
|
|
|
|
|
| Fort Wallace Ash Bed
|
formation
|
|
|
|
|
|
|
| Fort Worth Formation
|
formation
|
|
|
|
|
|
|
| Fortress Mountain Formation
|
formation
|
|
|
|
|
|
|
| Fossil Creek Volcanics
|
formation
|
|
|
|
|
|
|
| Fountain Formation
|
formation
|
|
|
|
Lyons Formation
|
|
|
| Four Corners Formation
|
formation
|
|
|
|
|
|
|
| Four Mile Dam Formation
|
formation
|
|
|
|
|
|
|
| Fowkes Formation
|
formation
|
|
|
|
|
|
|
| Fox Hills Formation
|
formation
|
|
|
|
Hell Creek Formation
Tanis
|
Pierre Shale
|
|
| Foxen Mudstone
|
formation
|
|
|
|
|
|
|
| Fra Cristobal Formation
|
formation
|
|
|
|
|
|
|
| Fraction Tuff
|
formation
|
|
|
|
|
|
|
| Fraileys Formation
|
formation
|
|
|
|
Haney Formation
|
Beech Creek Formation
|
|
| Fraileys Shale
|
formation
|
|
|
|
|
|
|
| Francis Formation
|
formation
|
|
|
|
|
|
|
| Franciscan Complex
|
formation
|
|
|
|
|
|
|
| Franconia Formation
|
formation
|
|
|
|
Potosi Formation
|
Ironton Sandstone
|
|
| Franklin Marble
|
formation
|
|
|
|
|
|
|
| Freda Sandstone
|
formation
|
|
|
|
Jacobsville Sandstone
|
Nonesuch Shale
|
|
| Frederick Limestone
|
formation
|
|
|
|
|
|
|
| Fredericksburg Group
|
formation
|
|
|
|
|
|
|
| Freel Peak Granodiorite
|
formation
|
|
|
|
|
|
|
| Freeman Silt
|
formation
|
|
|
|
|
|
|
| Freeport Formation
|
formation
|
|
|
|
|
|
|
| Fremont Formation
|
formation
|
|
|
|
|
|
|
| Frenchie Creek Rhyolite
|
formation
|
|
|
|
|
Sod House Tuff
|
|
| Frenchman Mountain Dolostone
|
formation
|
|
|
|
|
|
|
| Frenchville Formation
|
formation
|
|
|
|
|
|
|
| Friars Formation
|
formation
|
|
|
|
Stadium Conglomerate
|
Scripps Formation
|
|
| Frontier Formation
|
formation
|
|
|
|
Cody Shale
|
Mowry Shale
|
|
| Fruitland Formation
|
formation
|
|
|
|
Kirtland Formation
|
Pictured Cliffs Formation
|
|
| Funeral Formation
|
formation
|
|
|
|
|
|
|
| Funks Shale
|
formation
|
|
|
|
Forbes Shale
|
|
|
| Funston Limestone
|
formation
|
|
|
|
|
|
|
| Furnace Creek Formation
|
formation
|
|
|
|
|
|
|
| Furnaceville Formation
|
formation
|
|
|
|
|
|
|
| Furner Valley Limestone
|
formation
|
|
|
|
|
|
|
| Gabbs Formation
|
formation
|
|
|
|
|
|
|
| Gable Creek Formation
|
formation
|
|
|
|
|
|
|
| Gaikema Formation
|
formation
|
|
|
|
|
|
|
| Gaikema Sandstone
|
formation
|
|
|
|
|
|
|
| Gaillard Formation
|
formation
|
|
|
|
|
|
|
| Gale Hills Formation
|
formation
|
|
|
|
|
|
|
| Galena Dolomite
|
formation
|
|
|
|
|
|
|
| Galena Group
|
group
|
|
|
|
Dubuque Formation
|
Decorah Shale
|
|
| Galeros Formation
|
formation
|
|
|
|
|
|
|
| Galesburg Shale
|
formation
|
|
|
|
|
|
|
| Galisteo Formation
|
formation
|
|
|
|
|
|
|
| Gallatin Formation
|
formation
|
|
|
|
Bighorn Dolomite
|
Gros Ventre Formation
|
|
| Gallup Sandstone
|
formation
|
|
|
|
|
|
|
| Game Refuge Sandstone
|
formation
|
|
|
|
|
|
|
| Gaptank Formation
|
formation
|
|
|
|
|
Haymond Formation
|
|
| Garber Formation
|
formation
|
|
|
|
|
|
|
| Garber Sandstone
|
formation
|
|
|
|
Hennessey Formation
|
Chase Group
|
|
| Garcia Formation
|
formation
|
|
|
|
|
|
|
| Gardeau Formation
|
formation
|
|
|
|
|
|
|
| Garden City Formation
|
formation
|
|
|
|
|
|
|
| Garden Island Formation
|
formation
|
|
|
|
Bois Blanc Formation
|
Raisin River Dolomite
|
|
| Garden Valley Formation
|
formation
|
|
|
|
|
|
|
| Gardener's Clay Formation
|
formation
|
|
|
|
|
|
|
| Gardner Canyon Formation
|
formation
|
|
|
|
|
|
|
| Gardner Dolomite
|
formation
|
|
|
|
|
|
|
| Garita Creek Formation
|
formation
|
|
|
|
|
|
|
| Garnet Range Formation
|
formation
|
|
|
|
|
|
|
| Garrard Siltstone
|
formation
|
|
|
|
Calloway Creek Formation
|
Clays Ferry Formation
|
|
| Garrison Formation
|
formation
|
|
|
|
|
|
|
| Gartra Formation
|
formation
|
|
|
|
|
|
|
| Gasconade Formation
|
formation
|
|
|
|
Roubidoux Formation
|
Eminence Formation
|
|
| Gasper Limestone
|
formation
|
|
|
|
|
|
|
| Gasport Limestone
|
formation
|
|
|
|
|
|
|
| Gatesburg Formation
|
formation
|
|
|
|
|
|
|
| Gateway Formation
|
archaism
formation
|
|
|
|
|
|
|
| Gazelle Formation
|
formation
|
|
|
|
|
|
|
| Gem Hill Formation
|
lithostratigraphic unit
formation
|
|
|
|
|
|
|
| Gene Autry Formation
|
formation
|
|
|
|
|
|
|
| Gene Autry Shale
|
formation
|
|
|
|
|
|
|
| Genesee Group
|
formation
|
|
|
|
Sonyea Group
|
Mahantango Formation
|
|
| Geneseo Shale
|
formation
|
|
|
|
|
|
|
| Genundewa Limestone
|
formation
|
|
|
|
|
|
|
| George Lake Marble
|
formation
|
|
|
|
|
|
|
| Georgetown Formation
|
formation
|
|
|
|
Del Rio Formation
|
|
|
| Georgian Bay Formation
|
formation
|
|
|
|
|
|
|
| Gering Formation
|
formation
|
|
|
|
|
|
|
| Gerster Formation
|
formation
|
|
|
|
|
|
|
| Gettysburg Formation
|
formation
|
|
|
|
|
New Oxford Formation
|
|
| Gila Conglomerate
|
formation
|
|
|
|
|
|
|
| Gila Formation
|
formation
|
|
|
|
|
|
|
| Gilbert Formation
|
formation
|
|
|
|
|
|
|
| Gilboa Formation
|
formation
|
|
|
|
|
|
|
| Gilmore City Limestone
|
formation
|
|
|
|
|
|
|
| Gilmore Formation
|
formation
|
|
|
|
|
|
|
| Girkin Formation
|
formation
|
|
|
|
|
Ste. Genevieve Limestone
|
|
| Glen Aubrey Formation
|
formation
|
|
|
|
|
|
|
| Glen Canyon Group
|
group
|
|
|
|
|
|
|
| Glen Dean Formation
|
formation
|
|
|
|
|
|
|
| Glen Dean Limestone
|
formation
|
|
|
|
Tar Springs Formation
|
Hardinsburg Formation
|
|
| Glen Mountains Layered Complex
|
formation
|
|
|
|
|
|
|
| Glen Park Formation
|
formation
|
|
|
|
|
|
|
| Glen Rose Formation
|
formation
|
|
|
|
Paluxy Formation
|
Twin Mountains Formation
|
|
| Glen Rose Group
|
formation
|
|
|
|
|
|
|
| Glenarm Group
|
group
|
|
|
|
|
|
|
| Glendon Limestone
|
formation
|
|
|
|
|
|
|
| Glenmark Shale
|
formation
|
|
|
|
|
|
|
| Glenn Shale
|
formation
|
|
|
|
|
|
|
| Glenns Ferry Formation
|
formation
|
|
|
|
|
|
|
| Glenshaw Formation
|
formation
|
|
|
|
Casselman Formation
|
Allegheny Formation
|
|
| Glenwood Formation
|
formation
|
|
|
|
|
|
|
| Glenwood Shale
|
formation
|
|
|
|
Platteville Limestone
|
St. Peter Sandstone
|
|
| Glorieta Formation
|
formation
|
|
|
|
|
Yeso Formation
|
|
| Goat Seep Formation
|
formation
|
|
|
|
|
|
|
| Gober Chalk
|
formation
|
|
|
|
|
|
|
| Goddard Formation
|
formation
|
|
|
|
|
|
|
| Golconda Formation
|
formation
|
|
|
|
|
|
|
| Gold Ace Limestone
|
formation
|
|
|
|
Pyramid Shale
|
Echo Shale
|
|
| Gold Butte Granite
|
formation
|
|
|
|
|
|
|
| Gold Flat Tuff
|
formation
|
|
|
|
|
Trail Ridge Tuff
|
|
| Golden Door Volcanics
|
formation
|
|
|
|
|
|
|
| Golden Valley Formation
|
formation
|
|
|
|
White River Formation
|
Sentinel Butte Formation
|
|
| Goldens Ranch Formation
|
formation
|
|
|
|
|
|
|
| Goldstein Peak Formation
|
formation
|
|
|
|
|
|
|
| Goler Formation
|
formation
|
|
|
|
|
|
|
| Golf Course Formation
|
formation
|
|
|
|
|
|
|
| Goliad Formation
|
formation
|
|
|
|
|
|
|
| Golmeyer Creek Volcanics
|
formation
|
|
|
|
|
|
|
| Good Creek Formation
|
formation
|
|
|
|
|
|
|
| Goodhue Formation
|
formation
|
|
|
|
|
|
|
| Goodland Formation
|
formation
|
|
|
|
|
|
|
| Goodland Limestone
|
formation
|
|
|
|
Kiamichi Shale
|
Trinity Group
|
|
| Goodnight Beds
|
formation
|
|
|
|
|
|
|
| Goodsprings Dolomite
|
formation
|
|
|
|
|
|
|
| Goodwin Limestone
|
formation
|
|
|
|
Ninemile Formation
|
Windfall Formation
|
|
| Goose Creek Limestone
|
formation
|
|
|
|
|
|
|
| Goose Egg Formation
|
formation
|
|
|
|
|
|
|
| Gorge Formation
|
formation
|
|
|
|
|
|
|
| Gorman Formation
|
formation
|
|
|
|
|
|
|
| Gosport Sand
|
formation
|
|
|
|
|
|
|
| Goughs Canyon Formation
|
formation
|
|
|
|
|
|
|
| Gowanda Shale
|
formation
|
|
|
|
|
|
|
| Gower Formation
|
formation
|
|
|
|
unconformity
|
Scotch Grove Formation
|
|
| Graford Formation
|
formation
|
|
|
|
|
|
|
| Graham Formation
|
formation
|
|
|
|
|
|
|
| Graham Group
|
formation
|
|
|
|
|
|
|
| Grainger Formation
|
formation
|
|
|
|
|
|
|
| Grand Canyon Supergroup
|
supergroup
|
|
|
|
Great Unconformity
|
Vishnu Basement Rocks
|
|
| Grand Detour Formation
|
formation
|
|
|
|
|
|
|
| Grand Pitch Formation
|
formation
|
|
|
|
|
|
|
| Grand Prize Formation
|
formation
|
|
|
|
|
|
|
| Grand River Formation
|
formation
|
|
|
|
Ionia Formation
|
Saginaw Formation
|
|
| Grand Tower Limestone
|
formation
|
|
|
|
|
|
|
| Grande Ronde Basalt
|
formation
|
|
|
|
|
|
|
| Graneros Shale
|
formation
|
|
|
|
Greenhorn Limestone
|
Dakota Formation
|
|
| Granger Mountain Formation
|
formation
|
|
|
|
|
|
|
| Granite Basin Porphyry
|
formation
|
|
|
|
|
|
|
| Grant Lake Formation
|
formation
|
|
|
|
Arnheim Formation
|
Fairview Formation
|
|
| Grantsville Formation
|
formation
|
|
|
|
|
|
|
| Grass Valley Formation
|
formation
|
|
|
|
|
|
|
| Gratton Limestone
|
formation
|
|
|
|
|
|
|
| Gravel Point Formation
|
formation
|
|
|
|
|
|
|
| Gravelly Flat Formation
|
formation
|
|
|
|
|
|
|
| Gray Mesa Formation
|
formation
|
|
|
|
|
|
|
| Graylock Formation
|
formation
|
|
|
|
|
|
|
| Grayson Formation
|
formation
|
|
|
|
Buda Limestone
|
Georgetown Formation
|
|
| Grayson Marl
|
formation
|
|
|
|
|
|
|
| Great Blue Formation
|
formation
|
|
|
|
|
|
|
| Great Blue Limestone
|
formation
|
|
|
|
|
|
|
| Great Smoky Group
|
group
|
|
|
|
|
|
|
| Great Valley Group
|
formation
|
|
|
|
|
|
|
| Great Valley Sequence
|
formation
|
|
|
|
Cenozoic
|
basement
|
|
| Green Canyon Group
|
formation
|
|
|
|
|
|
|
| Green River Formation
|
formation
|
|
|
|
|
|
|
| Green Valley Formation
|
formation
|
|
|
|
|
|
|
| Greenbrier Limestone
|
formation
|
|
|
|
Bluefield Formation
|
Maccrady Formation
|
|
| Greene Formation
|
formation
|
|
|
|
|
Washington Formation
|
|
| Greenfield Formation
|
formation
|
|
|
|
|
|
|
| Greenhorn Formation
|
formation
|
|
|
|
|
|
|
| Greenhorn Limestone
|
formation
|
|
|
|
Carlile Formation
|
Graneros Shale
|
|
| Greenland Gap Group
|
formation
|
|
|
|
Hampshire Formation
|
Brallier Formation
|
|
| Greenvale Cove Formation
|
formation
|
|
|
|
Rangeley Formation
|
Quimby Formation
|
|
| Gregg Ranch Formation
|
formation
|
|
|
|
|
|
|
| Grenola Formation
|
formation
|
|
|
|
|
|
|
| Grenola Limestone
|
formation
|
|
|
|
|
|
|
| Greyson Formation
|
formation
|
|
|
|
|
|
|
| Greyson Shale
|
formation
|
|
|
|
|
|
|
| Grimsby Formation
|
formation
|
|
|
|
Thorold Sandstone
|
Devils Hole Sandstone
|
|
| Grindstone Formation
|
formation
|
|
|
|
|
|
|
| Grinnell Formation
|
formation
|
|
|
|
|
|
|
| Groos Quarry Formation
|
formation
|
|
|
|
|
|
|
| Gros Ventre Formation
|
formation
|
|
|
|
Gallatin Formation
|
|
|
| Grossman Formation
|
formation
|
|
|
|
|
|
|
| Grubstake Formation
|
formation
|
|
|
|
|
|
|
| Gualala Formation
|
formation
|
|
|
|
|
|
|
| Guayanilla Formation
|
formation
|
|
|
|
|
|
|
| Guayo Formation
|
formation
|
|
|
|
|
|
|
| Gubik Formation
|
formation
|
|
|
|
|
|
|
| Guelph Formation
|
formation
|
|
|
|
|
|
|
| Guilford Quartz Monzonite
|
formation
|
|
|
|
|
|
|
| Guilmette Formation
|
formation
|
|
|
|
|
|
|
| Gulf Group
|
formation
|
|
|
|
|
|
|
| Gullup Formation
|
formation
|
|
|
|
|
|
|
| Gunflint Iron Formation
|
formation
|
|
|
|
|
|
|
| Gunsight Formation
|
formation
|
|
|
|
|
|
|
| Guttenberg Formation
|
formation
|
|
|
|
|
|
|
| Gym Formation
|
formation
|
|
|
|
|
|
|
| Hachita Formation
|
formation
|
|
|
|
|
|
|
| Hackberry Group
|
formation
|
|
|
|
|
|
|
| Hailey Shales Formation
|
formation
|
|
|
|
|
|
|
| Hakatai Shale
|
formation
|
|
|
|
Shinumo Quartzite
|
Bass Formation
|
|
| Hale Formation
|
formation
|
|
|
|
Bloyd Formation
|
Pitkin Formation
|
|
| Hales Formation
|
formation
|
|
|
|
|
|
|
| Hales Limestone
|
formation
|
|
|
|
|
|
|
| Halleck Formation
|
formation
|
|
|
|
|
|
|
| Hamburg Formation
|
formation
|
|
|
|
|
|
|
| Hamilton Group
|
group
|
|
|
|
Brallier Formation
|
Marcellus Formation
|
|
| Hammer Creek Formation
|
formation
|
|
|
|
|
New Oxford Formation
|
|
| Hammett Shale
|
formation
|
|
|
|
|
|
|
| Hampshire Formation
|
formation
|
|
|
|
Price Formation
|
Foreknobs Formation
|
|
| Hampton Formation
|
formation
|
|
|
|
|
|
|
| Hance Formation
|
formation
|
|
|
|
|
|
|
| Haney Formation
|
formation
|
|
|
|
Hardinsburg Formation
|
Big Clifty Formation
|
|
| Haney Limestone
|
formation
|
|
|
|
|
|
|
| Hanna Formation
|
formation
|
|
|
|
|
|
|
| Hannold Hill Formation
|
formation
|
|
|
|
|
|
|
| Hanover Formation
|
formation
|
|
|
|
|
|
|
| Hanson Creek Formation
|
formation
|
|
|
|
Roberts Mountains Formation
|
Eureka Quartzite
|
|
| Happy Creek Formation
|
formation
|
|
|
|
|
|
|
| Haragan Formation
|
formation
|
|
|
|
|
|
|
| Hardgrave Formation
|
formation
|
|
|
|
|
|
|
| Harding Sandstone
|
formation
|
|
|
|
|
|
|
| Hardinsburg Formation
|
formation
|
|
|
|
Glen Dean Limestone
|
Haney Formation
|
|
| Hardy Creek Limestone
|
formation
|
|
|
|
|
|
|
| Hardyston Quartzite
|
formation
|
|
|
|
Kittatinny Formation
|
Wissahickon Formation
|
|
| Harebell Formation
|
formation
|
|
|
|
|
|
|
| Harkless Formation
|
formation
|
|
|
|
|
Poleta Formation
|
|
| Harleyville Formation
|
formation
|
|
|
|
|
|
|
| Harmony Formation
|
formation
|
|
|
|
|
|
|
| Harmony Hills Tuff
|
formation
|
|
|
|
|
|
|
| Harold Formation
|
formation
|
|
|
|
|
Crowder Formation
|
|
| Harpers Formation
|
formation
|
|
|
|
Antietam Formation
|
Weverton Formation
|
|
| Harpersville Formation
|
formation
|
|
|
|
|
|
|
| Harperville Formation
|
formation
|
|
|
|
|
|
|
| Harrell Formation
|
formation
|
|
|
|
Brallier Formation
|
Mahantango Formation
|
|
| Harrison Beds
|
formation
|
|
|
|
|
|
|
| Harrison Formation
|
formation
|
|
|
|
|
|
|
| Harrodsburg Limestone
|
formation
|
|
|
|
Salem Formation
|
Muldraugh Formation
|
|
| Hart Mine Formation
|
formation
|
|
|
|
|
|
|
| Hartford Limestone
|
formation
|
|
|
|
|
|
|
| Hartselle Sandstone
|
formation
|
|
|
|
|
|
|
| Hartshorne Formation
|
formation
|
|
|
|
McAlester Formation
|
Atoka Formation
|
|
| Hartt Cabin Bed
|
bed
|
|
|
|
|
|
|
| Hasen Creek Formation
|
formation
|
|
|
|
|
|
|
| Hatch Shale
|
formation
|
|
|
|
|
|
|
| Hatchetigbee Bluff Formation
|
formation
|
|
|
|
|
|
|
| Havallah Formation
|
formation
|
|
|
|
|
|
|
| Havensville Formation
|
formation
|
|
|
|
|
|
|
| Hawthorn Formation
|
formation
|
|
|
|
|
|
|
| Hawthorn Group
|
group
|
|
|
|
|
Ocala Limestone
|
|
| Hawthorne Group
|
formation
|
|
|
|
|
|
|
| Hay Ranch Formation
|
formation
|
|
|
|
|
|
|
| Haymond Formation
|
formation
|
|
|
|
Gaptank Formation
|
Dimple Limestone
|
|
| Hayner Ranch Formation
|
formation
|
|
|
|
|
|
|
| Haynesville Formation
|
formation
|
|
|
|
|
|
|
| Haynesville Shale
|
natural gas field
formation
|
|
|
|
|
|
|
| Haystack Mountains Formation
|
formation
|
|
|
|
|
|
|
| Heath Shale
|
formation
|
|
|
|
|
|
|
| Heceta Limestone
|
formation
|
|
|
|
|
|
|
| Hector Formation
|
formation
|
|
|
|
|
|
|
| Helderberg Formation
|
formation
|
|
|
|
|
|
|
| Helderberg Group
|
group
|
|
|
|
Onondaga Formation
|
Keyser Formation
|
|
| Helena Formation
|
formation
|
|
|
|
|
|
|
| Hell Creek Formation
|
formation
|
|
Maastrichtian
|
Danian
|
Fort Union Formation
|
Fox Hills Formation
|
|
| Helms Formation
|
formation
|
|
|
|
|
|
|
| Hendersonville Shale
|
formation
|
|
|
|
|
|
|
| Hendricks Formation
|
formation
|
|
|
|
Schoolcraft Formation
|
Byron Formation
|
|
| Henefer Formation
|
formation
|
|
|
|
|
|
|
| Hennessey Formation
|
formation
|
|
|
|
|
Garber Sandstone
|
|
| Henryetta Coal Formation
|
formation
|
|
|
|
|
|
|
| Henryhouse Formation
|
formation
|
|
|
|
|
|
|
| Hensel Formation
|
formation
|
|
|
|
|
|
|
| Hensel Sand
|
formation
|
|
|
|
|
|
|
| Hepburn's Mesa Formation
|
formation
|
|
|
|
|
|
|
| Hepler Unit
|
formation
|
|
|
|
|
|
|
| Herington Formation
|
formation
|
|
|
|
|
|
|
| Herkimer Formation
|
formation
|
|
|
|
|
|
|
| Hermit Formation
|
formation
|
|
|
|
Coconino Sandstone
|
Esplanade Sandstone
Supai Group
|
|
| Hermitage Formation
|
formation
|
|
|
|
|
Stones River Group
|
|
| Hermosa Formation
|
formation
|
|
|
|
Cutler Formation
|
|
|
| Hermosa Group
|
group
|
|
|
|
|
|
|
| Hertha Formation
|
formation
|
|
|
|
|
|
|
| Hess Formation
|
formation
|
|
|
|
|
|
|
| Hidden Valley Dolomite
|
formation
|
|
|
|
Lost Burro Formation
|
Ely Springs Dolomite
|
|
| Highgate Formation
|
formation
|
|
|
|
|
|
|
| Highland Peak Formation
|
formation
|
|
|
|
|
|
|
| Hillard Limestone
|
formation
|
|
|
|
|
|
|
| Hillsboro Sandstone
|
formation
|
|
|
|
Olentangy Shale
|
Tymochtee Formation
|
|
| Hillsdale Limestone
|
formation
|
|
|
|
|
|
|
| Hinchman Formation
|
formation
|
|
|
|
|
|
|
| Hinckley Sandstone
|
formation
|
|
|
|
|
|
|
| Hindsville Formation
|
formation
|
|
|
|
Fayetteville Shale
|
Moorefield Formation
|
|
| Hindsville Limestone
|
formation
|
|
|
|
|
|
|
| Hinton Formation
|
formation
|
|
|
|
Princeton Sandstone
|
Bluefield Formation
|
|
| Hoback Formation
|
formation
|
|
|
|
|
|
|
| Hogeye Tuff
|
formation
|
|
|
|
|
|
|
| Hogshooter Formation
|
formation
|
|
|
|
|
|
|
| Hoko River Formation
|
formation
|
|
|
|
Makah Formation
|
|
|
| Holdenville Formation
|
formation
|
|
|
|
|
|
|
| Holder Formation
|
formation
|
|
|
|
|
|
|
| Holitna Formation
|
formation
|
|
|
|
|
|
|
| Holland Quarry Shale
|
formation
|
|
|
|
Detroit River Group
|
|
|
| Hollenberg Formation
|
formation
|
|
|
|
|
|
|
| Holly Creek Formation
|
formation
|
|
|
|
|
|
|
| Hollywood Formation
|
formation
|
|
|
|
Antelope Springs Formation
|
|
|
| Holston Formation
|
formation
|
|
|
|
|
|
|
| Hominy Peak Formation
|
formation
|
|
|
|
|
|
|
| Honaker Trail Formation
|
formation
|
|
|
|
Halgaito Member
|
|
|
| Honesdale Formation
|
formation
|
|
|
|
|
|
|
| Honeycut Formation
|
formation
|
|
|
|
|
|
|
| Hoodoo Formation
|
formation
|
|
|
|
|
|
|
| Hoodoo Quartzite
|
formation
|
|
|
|
|
|
|
| Hookton Formation
|
formation
|
|
|
|
|
|
|
| Hopkinton Dolomite
|
formation
|
|
|
|
|
|
|
| Hoppers Formation
|
formation
|
|
|
|
|
|
|
| Hoppin Formation
|
formation
|
|
|
|
|
|
|
| Hornbrook Formation
|
formation
|
|
|
|
|
|
|
| Horned Toad Formation
|
formation
|
|
|
|
|
|
|
| Hornerstown Formation
|
formation
|
|
|
|
Vincentown Formation
|
New Egypt Formation
|
|
| Horry Clay
|
formation
|
|
|
|
|
|
|
| Horse Bench Sandstone Bed
|
bed
|
|
|
|
|
|
|
| Horse Camp Formation
|
formation
|
|
|
|
|
|
|
| Horse Spring Formation
|
formation
|
|
|
|
Muddy Creek Formation
|
|
|
| Horseshoe Gulch Formation
|
formation
|
|
|
|
|
|
|
| Horsethief Sandstone
|
formation
|
|
|
|
|
|
|
| Hoskinnini Member
|
member
formation
|
|
|
|
|
|
|
| Hosselkus Limestone
|
formation
|
|
|
|
|
|
|
| Hosston Formation
|
formation
member
|
|
|
|
|
|
|
| Hound Island Volcanics
|
formation
|
|
|
|
|
|
|
| House Limestone
|
formation
|
|
|
|
|
|
|
| Howard Formation
|
formation
|
|
|
|
|
|
|
| Hoyt Canyon Formation
|
formation
|
|
|
|
|
|
|
| Hoyt Limestone
|
formation
|
|
|
|
|
|
|
| Hualapai Limestone
|
formation
|
|
|
|
|
|
|
| Hudspeth Formation
|
formation
|
|
|
|
|
|
|
| Hueco Canyon Formation
|
formation
|
|
|
|
|
|
|
| Hueco Formation
|
formation
|
|
|
|
|
|
|
| Huerfano Formation
|
formation
|
|
|
|
|
|
|
| Humboldt Formation
|
formation
|
|
|
|
|
|
|
| Humbug Formation
|
formation
|
|
|
|
|
|
|
| Hungry Valley Formation
|
formation
|
|
|
|
|
|
|
| Hunter Canyon Formation
|
formation
|
|
|
|
|
|
|
| Huntersville Chert
|
formation
|
|
|
|
Marcellus Formation
|
Oriskany Formation
|
|
| Huntersville Formation
|
formation
|
|
|
|
|
|
|
| Huntley Mountain Formation
|
formation
|
|
|
|
Pocono Formation
|
|
|
| Hunton Formation
|
formation
|
|
|
|
|
|
|
| Hunton Group
|
group
|
|
|
|
|
|
|
| Huntsman Shale
|
formation
|
|
|
|
|
|
|
| Hurwal Formation
|
formation
|
|
|
|
|
|
|
| Hyalite Peak Volcanics
|
formation
|
|
|
|
|
|
|
| Hyco Formation
|
formation
|
|
|
|
Aaron Formation
|
|
|
| Hyde Formation
|
formation
|
|
|
|
|
|
|
| Iatan Formation
|
formation
|
|
|
|
|
|
|
| Ibex Formation
|
formation
|
|
|
|
|
|
|
| Idavada Volcanics
|
formation
|
|
|
|
|
|
|
| Ignacio Quartzite
|
formation
|
|
|
|
|
|
|
| Ignek Formation
|
formation
|
|
|
|
|
|
|
| Iles Formation
|
formation
|
|
|
|
|
|
|
| Ilion Formation
|
formation
|
|
|
|
|
|
|
| Illipah Formation
|
formation
|
|
|
|
|
|
|
| Imnaha Basalt
|
formation
|
|
|
|
|
|
|
| Imo Formation
|
formation
|
|
|
|
|
|
|
| Imuruk Volcanics
|
formation
|
|
|
|
|
|
|
| Independence Shale
|
formation
|
|
|
|
|
|
|
| Indian Lakes Formation
|
formation
|
|
|
|
|
|
|
| Indian Meadows Formation
|
formation
|
|
|
|
|
|
|
| Indian Springs Formation
|
formation
|
|
|
|
|
|
|
| Ingersoll Shale
|
formation
|
|
|
|
|
|
|
| Inglis Formation
|
formation
|
|
|
|
|
|
|
| Inman Formation
|
formation
|
|
|
|
|
|
|
| Inskip Formation
|
formation
|
|
|
|
|
|
|
| Inyan Kara Group
|
formation
|
|
|
|
|
|
|
| Inyo Creek Formation
|
formation
|
|
|
|
|
|
|
| Iola Formation
|
formation
|
|
|
|
|
|
|
| Ion Formation
|
formation
|
|
|
|
|
|
|
| Ionia Formation
|
formation
|
|
|
|
|
Grand River Formation
|
|
| Iron Springs Formation
|
formation
|
|
|
|
|
|
|
| Irondequoit Limestone
|
formation
|
|
|
|
|
|
|
| Irons Fork Mountain Formation
|
formation
|
|
|
|
|
|
|
| Isom Formation
|
formation
|
|
|
|
|
|
|
| Ithaca Formation
|
formation
|
|
|
|
|
|
|
| Ivishak Formation
|
formation
|
|
|
|
|
|
|
| Jacaguas Group
|
group
|
|
|
|
|
|
|
| Jackfork Group
|
group
|
|
|
|
|
|
|
| Jackfork Sandstone
|
formation
|
|
|
|
Johns Valley Formation
Atoka Formation
|
Stanley Shale
|
|
| Jacks Peak Formation
|
formation
|
|
|
|
|
|
|
| Jacksboro Limestone
|
formation
|
|
|
|
|
|
|
| Jackson Bluff Formation
|
formation
|
|
|
|
|
|
|
| Jackson Formation
|
formation
|
|
|
|
|
|
|
| Jackson Group
|
formation
|
|
|
|
|
|
|
| Jacksonian Formation
|
formation
|
|
|
|
|
|
|
| Jacobs Ranch Formation
|
formation
|
|
|
|
|
|
|
| Jacobsville Sandstone
|
formation
|
|
|
|
Munising Formation
|
Freda Sandstone
|
|
| Jalama Formation
|
formation
|
|
|
|
Juncal Formation
|
Espada Formation
|
|
| James City Formation
|
formation
|
|
|
|
|
|
|
| James Run Formation
|
formation
|
|
|
|
|
|
|
| Jamestown Formation
|
formation
|
|
|
|
|
|
|
| Janesville Shale
|
formation
|
|
|
|
|
|
|
| Jangle Limestone
|
formation
|
|
|
|
Desert Range Limestone
|
Pahrump Hills Shale
|
|
| Java Formation
|
formation
|
|
|
|
Ohio Shale
|
West Falls Group
|
|
| Javelina Formation
|
formation
|
|
|
|
Black Peaks Formation
|
Aguja Formation
|
|
| Jaycox Formation
|
formation
|
|
|
|
|
|
|
| Jefferson City Formation
|
formation
|
|
|
|
Cotter Formation
|
Roubidoux Formation
|
|
| Jefferson Formation
|
formation
|
|
|
|
|
|
|
| Jefferson Group
|
group
|
|
|
|
|
|
|
| Jeffersonville Limestone
|
formation
|
|
|
|
North Vernon Limestone
|
Clear Creek Chert
|
|
| Jelm Formation
|
formation
|
|
|
|
|
|
|
| Jennings Formation
|
formation
|
|
|
|
|
|
|
| Jesse Ewing Canyon Formation
|
formation
|
|
|
|
|
|
|
| Jewel Quartzite
|
formation
|
|
|
|
|
|
|
| Jewett Sand Formation
|
formation
|
|
|
|
|
|
|
| Joachim Dolomite
|
formation
|
|
|
|
Pecatonica Formation
|
St. Peter Sandstone
|
|
| Joana Limestone
|
formation
|
|
|
|
Chainman Formation
|
|
|
| Joaquin Formation
|
formation
|
|
|
|
|
|
|
| John Day Formation
|
formation
|
|
|
|
Columbia River Basalt Group
|
Clarno Formation
|
|
| Johnnie Formation
|
formation
|
|
|
|
Stirling Quartzite Formation
|
|
|
| Johns Valley Formation
|
formation
|
|
|
|
Atoka Formation
|
Jackfork Sandstone
|
|
| Johns Wash Limestone
|
formation
|
|
|
|
|
|
|
| Johnson Formation
|
formation
|
|
|
|
Red Eagle Formation
|
Foraker Limestone
|
|
| Johnson Shale
|
formation
|
|
|
|
|
|
|
| Johnson Spring Formation
|
formation
|
|
|
|
Ely Springs Dolomite
|
Barrel Spring Formation
|
|
| Joins Formation
|
formation
|
|
|
|
|
|
|
| Jones Ridge Limestone
|
formation
|
|
|
|
|
|
|
| Jordan Coal
|
formation
|
|
|
|
|
|
|
| Jordan Formation
|
formation
|
|
|
|
Oneota Formation
|
|
|
| Jordan Sandstone
|
formation
|
|
|
|
Oneota Formation
|
|
|
| Josephine Formation
|
formation
|
|
|
|
|
|
|
| Joslin Hill Formation
|
formation
|
|
|
|
|
|
|
| José Formation
|
formation
|
|
|
|
|
|
|
| Juab Limestone
|
formation
|
|
|
|
Kanosh Formation
|
|
|
| Judith River Formation
|
formation
|
|
|
|
Bearpaw Shale
|
Pakowki Formation
|
|
| Juncal Formation
|
formation
|
|
|
|
Matilija Sandstone
|
Sierra Blanca Limestone
|
|
| Juniata Formation
|
formation
|
|
|
|
Oswego Formation
|
Bald Eagle Formation
|
|
| Juntura Formation
|
formation
|
|
|
|
|
|
|
| Kaibab Limestone
|
formation
|
|
|
|
Moenkopi Formation
|
Toroweap Formation
White Rim Sandstone
|
|
| Kaiparowits Formation
|
formation
|
|
|
|
|
|
|
| Kalkberg Formation
|
formation
|
|
|
|
|
|
|
| Kalkberg Limestone
|
formation
|
|
|
|
New Scotland Formation
|
Coeymans Limestone
|
|
| Kallander Creek Formation
|
formation
|
|
|
|
|
|
|
| Kamishak Formation
|
formation
|
|
|
|
|
|
|
| Kamp Ranch Limestone
|
formation
|
|
|
|
|
|
|
| Kanawha Formation
|
formation
|
|
|
|
Allegheny Formation
|
New River Formation
|
|
| Kanayut Formation
|
formation
|
|
|
|
|
|
|
| Kangaroo Ranch Formation
|
formation
|
|
|
|
|
|
|
| Kanosh Formation
|
formation
|
|
|
|
Lehman Formation
|
Juab Limestone
|
|
| Kanosh Shale
|
formation
|
|
|
|
|
|
|
| Kansas City Formation
|
formation
|
|
|
|
|
|
|
| Kansas City Group
|
group
|
|
|
|
|
|
|
| Kanwaka Formation
|
formation
|
|
|
|
|
|
|
| Karheen Formation
|
formation
|
|
|
|
|
|
|
| Kashevarof Formation
|
formation
|
|
|
|
|
|
|
| Kayenta Formation
|
formation
|
|
|
|
Navajo Sandstone
|
Wingate Sandstone
|
Navajo Sandstone
|
| Keasey Formation
|
formation
|
|
|
|
|
|
|
| Keating Formation
|
formation
|
|
|
|
|
|
|
| Keefer Sandstone
|
formation
|
|
|
|
Rochester Shale
|
Rose Hill Formation
|
|
| Keel Formation
|
formation
|
|
|
|
|
|
|
| Keller Creek Shale
|
formation
|
|
|
|
|
|
|
| Kellogg Shale
|
formation
|
|
|
|
|
|
|
| Kelvin Formation
|
formation
|
|
|
|
|
|
|
| Kemp Clay
|
formation
|
|
|
|
|
|
|
| Kempsville Formation
|
formation
|
|
|
|
|
|
|
| Kennel Creek Formation
|
formation
|
|
|
|
|
|
|
| Kennicott Formation
|
formation
|
|
|
|
|
|
|
| Keokuk Limestone
|
formation
|
|
|
|
Warsaw Formation
|
Burlington Limestone
|
|
| Kerbel Formation
|
formation
|
|
|
|
Knox Dolomite
|
Eau Claire Formation
|
|
| Kereford Formation
|
formation
|
|
|
|
|
|
|
| Kern River Beds
|
formation
|
|
|
|
Pleistocene
|
Etchegoin Formation
|
|
| Kessler Canyon Formation
|
formation
|
|
|
|
|
|
|
| Keweenawan Supergroup
|
supergroup
|
|
|
|
|
|
|
| Keys Valley Marl
|
formation
|
|
|
|
|
|
|
| Keyser Formation
|
formation
|
|
|
|
|
Tonoloway Formation
|
|
| Keyser Limestone Formation
|
formation
|
|
|
|
|
|
|
| Kialagvik Formation
|
formation
|
|
|
|
|
|
|
| Kiamichi Shale
|
formation
|
|
|
|
Woodbine Formation
|
Goodland Limestone
|
|
| Killdeer Formation
|
formation
|
|
|
|
|
|
|
| Kimball Mountain Bed
|
bed
|
|
|
|
|
|
|
| Kimmswick Limestone
|
formation
|
|
|
|
Cape Limestone
|
Decorah Shale
|
|
| Kincaid Formation
|
formation
|
|
|
|
Porters Creek Formation
|
Arkadelphia Marl
|
|
| Kindblade Formation
|
formation
|
|
|
|
|
|
|
| King Lear Formation
|
formation
|
|
|
|
|
|
|
| Kingak Shale
|
formation
|
|
|
|
|
|
|
| Kings Falls Limestone
|
formation
|
|
|
|
|
|
|
| Kingston Peak Formation
|
formation
|
|
|
|
|
Beck Spring Dolomite
|
|
| Kinkaid Formation
|
formation
|
|
|
|
|
|
|
| Kinkead Spring Limestone
|
formation
|
|
|
|
|
Davis Spring Formation
|
|
| Kinzers Formation
|
formation
|
|
|
|
Ledger Formation
|
Vintage Dolomite
|
|
| Kiowa Formation
|
formation
|
|
|
|
|
|
|
| Kiowa Shale
|
formation
|
|
|
|
|
|
|
| Kirkland Formation
|
formation
|
|
|
|
|
|
|
| Kirtland Formation
|
formation
|
|
|
|
Ojo Alamo Formation
|
Fruitland Formation
|
|
| Kishenehn Formation
|
formation
|
|
|
|
|
|
|
| Kisimilok Formation
|
formation
|
|
|
|
|
Telavirak Formation
|
|
| Kiskatom Formation
|
formation
|
|
|
|
|
|
|
| Kittatinny Formation
|
formation
|
|
|
|
|
|
|
| Kittery Formation
|
formation
|
|
|
|
|
|
|
| Klondike Mountain Formation
|
formation
|
|
|
|
|
|
|
| Knox Group
|
group
|
|
|
|
|
Conasauga Group
|
|
| Kodak Sandstone
|
formation
|
|
|
|
|
Cambria Shale
|
|
| Kodiak Formation
|
formation
|
|
|
|
|
|
|
| Kogruk Formation
|
formation
|
|
|
|
|
|
|
| Kokomo Formation
|
formation
|
|
|
|
|
|
|
| Konawa Formation
|
formation
|
|
|
|
|
|
|
| Kongakut Formation
|
formation
|
|
|
|
|
|
|
| Kootenai Formation
|
formation
|
|
|
|
Blackleaf Formation
|
Morrison Formation
|
|
| Kope Formation
|
formation
|
|
|
|
Dillsboro Formation
Fairview Formation
|
Lexington Limestone
Point Pleasant Formation
|
|
| Kosciusko Formation
|
formation
|
|
|
|
|
|
|
| Kramer Beds Formation
|
formation
|
|
|
|
|
|
|
| Krebs Formation
|
formation
|
|
|
|
|
|
|
| Krebs Group
|
group
|
|
|
|
|
|
|
| Kreyenhagen Shale
|
formation
|
|
|
|
Temblor Formation
|
|
|
| Kugururok Formation
|
formation
|
|
|
|
|
|
|
| Kukpowruk Formation
|
formation
|
|
|
|
|
|
|
| Kuna Formation
|
formation
|
|
|
|
|
|
|
| Kwagunt Formation
|
formation
|
|
|
|
|
|
|
| La Cruz Peak Formation
|
formation
|
|
|
|
|
|
|
| La Habra Formation
|
formation
|
|
|
|
|
|
|
| La Jolla Group
|
group
|
|
|
|
|
|
|
| La Pasada Formation
|
formation
|
|
|
|
|
|
|
| LaClede Bed
|
bed
|
|
|
|
|
|
|
| LaPorte City Formation
|
formation
|
|
|
|
|
|
|
| Labette Formation
|
formation
|
|
|
|
|
|
|
| Laborcita Formation
|
formation
|
|
|
|
|
|
|
| Ladd Formation
|
formation
|
|
|
|
|
|
|
| Ladera Sandstone
|
formation
|
|
|
|
|
|
|
| Ladrones Formation
|
formation
|
|
|
|
|
|
|
| Ladson Formation
|
formation
|
|
|
|
|
|
|
| Lafferty Limestone
|
formation
|
|
|
|
Penters Chert
|
St. Clair Limestone
|
|
| Lagrima Formation
|
formation
|
|
|
|
Finlay Limestone
|
Benigno Limestone
|
|
| Laguna Seca Formation
|
formation
|
|
|
|
|
|
|
| Lahontan Valley Group
|
group
|
|
|
|
|
|
|
| Lake Church Formation
|
formation
|
|
|
|
|
|
|
| Lake Mathews Formation
|
formation
|
|
|
|
|
|
|
| Lake Murray Formation
|
formation
|
|
|
|
|
|
|
| Lake Point Limestone
|
formation
|
|
|
|
|
|
|
| Lake Valley Formation
|
formation
|
|
|
|
|
|
|
| Lake Waco Formation
|
formation
|
|
|
|
|
Pepper Shale
|
|
| Laketown Dolomite
|
formation
|
|
|
|
|
|
|
| Lakeview Formation
|
formation
|
|
|
|
|
|
|
| Lakota Formation
|
formation
|
|
|
|
|
Morrison Formation
|
|
| Lamar River Formation
|
formation
|
|
|
|
|
|
|
| Lance Formation
|
formation
geographic location
|
|
|
|
Fort Union Formation
|
Meeteetse Formation
|
|
| Langford Formation
|
formation
|
|
|
|
|
|
|
| Langston Formation
|
formation
|
|
|
|
Ute Formation
|
|
|
| Lansing Group
|
formation
|
|
|
|
|
|
|
| Lantz Mills Formation
|
formation
|
|
|
|
|
|
|
| Laramie Formation
|
formation
|
|
|
|
Arapahoe Formation
|
Fox Hills Formation
|
|
| Laredo Formation
|
formation
|
|
|
|
|
|
|
| Lares Limestone
|
formation
|
|
|
|
|
|
|
| Las Animas Formation
|
formation
|
|
|
|
|
|
|
| Las Vegas Formation
|
formation
|
|
|
|
|
|
|
| Las Vigas Formation
|
formation
|
|
|
|
Cuchillo Formation
|
|
|
| Latah Formation
|
formation
|
|
|
|
|
Columbia River Basalt Group
|
|
| Latham Shale
|
formation
|
|
|
|
|
|
|
| Laurel Limestone
|
formation
|
|
|
|
Massie Shale
|
Osgood Formation
|
|
| Lavaca Flats Beds
|
formation
|
|
|
|
|
|
|
| Laverne Formation
|
formation
|
|
|
|
|
|
|
| Lawrence Shale
|
formation
|
|
|
|
|
|
|
| Laycock Graywacke
|
formation
|
|
|
|
|
|
|
| Lazy Bend Formation
|
formation
|
|
|
|
|
|
|
| Leach Canyon Formation
|
formation
|
|
|
|
|
|
|
| Lead Bell Shale
|
formation
|
|
|
|
|
|
|
| Leadville Limestone
|
formation
|
|
|
|
|
|
|
| Lebanon Limestone
|
formation
|
|
|
|
|
|
|
| Lebo Member
|
formation
|
|
|
|
Tongue River Member
|
|
|
| Lecompton Formation
|
formation
|
|
|
|
|
|
|
| Ledger Formation
|
formation
|
|
|
|
|
Kinzers Formation
|
|
| Lee Formation
|
formation
|
|
|
|
|
|
|
| Lee Group
|
formation
|
|
|
|
|
|
|
| Leemon Formation
|
formation
|
|
|
|
|
|
|
| Lehman Formation
|
formation
|
|
|
|
|
|
|
| Leipers Formation
|
formation
|
|
|
|
|
|
|
| Leipers Limestone
|
formation
|
|
|
|
Chattanooga Shale
|
Catheys Formation
|
|
| Leithsville Formation
|
formation
|
|
|
|
|
Hardyston Quartzite
|
|
| Lemhi Group
|
group
|
|
|
|
|
|
|
| Lenoir Formation
|
formation
|
|
|
|
|
|
|
| Lenoir Limestone
|
formation
|
|
|
|
|
|
|
| Lenox Hills Formation
|
formation
|
|
|
|
|
|
|
| Leonard Series
|
formation
|
|
|
|
|
|
|
| Lewis Shale
|
formation
|
|
|
|
|
Ute Canyon Tongue
|
|
| Lexington Limestone
|
formation
|
|
|
|
Point Pleasant Formation
|
Black River Group
Tyrone Limestone
|
|
| Libby Formation
|
formation
|
|
|
|
|
|
|
| Liberty Formation
|
formation
|
|
|
|
Saluda Formation
|
Waynesville Formation
|
|
| Liberty Hall Formation
|
formation
|
|
|
|
|
|
|
| Licklog Formation
|
formation
|
|
|
|
|
|
|
| Lilley Formation
|
formation
|
|
|
|
Peebles Dolomite
|
Bisher Formation
|
|
| Lilydale Shale
|
formation
|
|
|
|
|
|
|
| Lime Creek Formation
|
formation
|
|
|
|
|
|
|
| Lime Island Formation
|
formation
|
|
|
|
Byron Formation
|
Cabot Head Shale
|
|
| Lime Ridge Formation
|
formation
|
|
|
|
|
|
|
| Limestone Mountain Formation
|
formation
|
|
|
|
|
|
|
| Lincoln Creek Formation
|
formation
|
|
|
|
|
|
|
| Lincoln Peak Formation
|
formation
|
|
|
|
|
|
|
| Linden Formation
|
formation
|
|
|
|
|
|
|
| Linton Formation
|
formation
|
|
|
|
Petersburg Formation
|
Staunton Formation
|
|
| Linwood Formation
|
formation
|
|
|
|
|
|
|
| Lisbon Formation
|
formation
|
|
|
|
|
|
|
| Lisburne Group
|
formation
|
|
|
|
|
|
|
| Lithograph City Formation
|
formation
|
|
|
|
|
|
|
| Little Cedar Formation
|
formation
|
|
|
|
|
|
|
| Little Creek breccia
|
formation
|
|
|
|
|
|
|
| Little East Lake Formation
|
formation
|
|
|
|
|
|
|
| Little Elk Granite
|
formation
|
|
|
|
|
|
|
| Little Falls Formation
|
formation
|
|
|
|
|
|
|
| Little Flat Formation
|
formation
|
|
|
|
|
|
|
| Little Oak Formation
|
formation
|
|
|
|
|
|
|
| Little Valley Formation
|
formation
|
|
|
|
|
|
|
| Littleton Formation
|
formation
|
|
|
|
|
|
|
| Livermore Gravels Formation
|
formation
|
|
|
|
|
|
|
| Livingston Formation
|
formation
|
|
|
|
|
|
|
| Livingston Group
|
group
|
|
|
|
|
|
|
| Llajas Formation
|
formation
|
|
|
|
Sespe Formation
|
Santa Susana Formation
|
|
| Llewellyn Formation
|
formation
|
|
|
|
|
Pottsville Formation
|
|
| Lobo Formation
|
formation
|
|
|
|
|
|
|
| Locatelli Formation
|
formation
|
|
|
|
|
|
|
| Lock Haven Formation
|
formation
|
|
|
|
Catskill Formation
|
Brallier Formation
|
|
| Lockatong Formation
|
formation
|
|
|
|
Passaic Formation
|
Stockton Formation
|
|
| Lockport Dolomite
|
formation
|
|
|
|
Greenfield Dolomite
|
Clinton Group
|
|
| Lockport Group
|
group
|
|
|
|
|
|
|
| Locust Point Formation
|
formation
|
|
|
|
|
|
|
| Lodgepole Limestone
|
formation
|
|
|
|
|
|
|
| Lodi Formation
|
formation
|
|
|
|
|
|
|
| Lodo Formation
|
formation
|
|
|
|
|
|
|
| Lodoga Formation
|
formation
|
|
|
|
|
|
|
| Log Springs Formation
|
formation
|
|
|
|
Osha Canyon Formation
|
Arroyo Penasco Formation
|
|
| Logan Formation
|
formation
|
|
|
|
Maxville Limestone
|
Cuyahoga Formation
|
|
| Logansport Formation
|
formation
|
|
|
|
|
|
|
| Lomita Marl
|
formation
|
|
|
|
|
|
|
| Lompico Sandstone
|
formation
|
|
|
|
|
|
|
| Lone Camp Group
|
formation
|
|
|
|
|
|
|
| Lone Mountain Dolomite
|
formation
|
|
|
|
|
Roberts Mountains Formation
|
|
| Lone Mountain Formation
|
formation
|
|
|
|
|
|
|
| Lonesome Formation
|
formation
|
|
|
|
|
|
|
| Long Pine Formation
|
formation
|
|
|
|
|
|
|
| Long Point Bed
|
bed
|
|
|
|
|
|
|
| Longview Formation
|
formation
|
|
|
|
|
|
|
| Lookingglass Formation
|
formation
|
|
|
|
|
|
|
| Loray Formation
|
formation
|
|
|
|
|
|
|
| Lori Formation
|
formation
|
|
|
|
Packard Wash Formation
|
Antelope Springs Formation
|
|
| Los Moyos Limestone
|
formation
|
|
|
|
Wild Cow Formation
|
|
|
| Los Puertos Formation
|
formation
|
|
|
|
|
|
|
| Lospe Formation
|
formation
|
|
|
|
|
|
|
| Lost Branch Formation
|
formation
|
|
|
|
|
|
|
| Lost Burro Formation
|
formation
|
|
|
|
|
Hidden Valley Dolomite
|
|
| Louisiana Limestone
|
formation
|
|
|
|
|
|
|
| Louisville Formation
|
formation
|
|
|
|
|
|
|
| Louisville Limestone
|
formation
|
|
|
|
Jeffersonville Limestone
|
Waldron Shale
|
|
| Lourdes Formation
|
formation
|
|
|
|
|
|
|
| Lousetown Formation
|
formation
|
|
|
|
|
|
|
| Love Formation
|
formation
|
|
|
|
|
|
|
| Lowell Formation
|
formation
|
|
|
|
|
|
|
| Lower Whitewater
|
formation
|
|
|
|
|
|
|
| Lubbe Creek Formation
|
formation
|
|
|
|
|
|
|
| Lucas Formation
|
formation
|
|
|
|
Anderdon Limestone
|
Amherstburg Formation
|
|
| Ludlow Formation
|
formation
|
|
|
|
Cannonball Formation
|
Hell Creek Formation
|
|
| Ludlowville Formation
|
formation
|
|
|
|
Moscow Formation
|
|
|
| Lueders Formation
|
formation
|
|
|
|
|
|
|
| Lumbee Group
|
group
|
|
|
|
|
|
|
| Lund Formation
|
formation
member
|
|
|
|
|
|
|
| Luning Formation
|
formation
|
|
|
|
|
|
|
| Lyndon Limestone
|
formation
|
|
|
|
|
|
|
| Lyons Formation
|
formation
|
|
|
|
|
Fountain Formation
|
|
| Lytle Formation
|
formation
|
|
|
|
|
|
|
| MacColl Ridge Formation
|
formation
|
|
|
|
|
Chititu Formation
|
|
| Maccrady Formation
|
formation
|
|
|
|
Greenbrier Limestone
|
Price Formation
|
|
| Machias Formation
|
formation
|
|
|
|
|
|
|
| Madera Formation
|
formation
|
|
|
|
Abo Formation
|
Sandia Formation
|
|
| Madera Group
|
formation
|
|
|
|
Abo Formation
|
|
|
| Madison Group
|
formation
|
|
|
|
|
Bakken formation
|
|
| Madison Valley Formation
|
formation
|
|
|
|
|
|
|
| Magdalen Limestone
|
formation
|
|
|
|
|
|
|
| Magdalena Formation
|
formation
|
|
|
|
|
|
|
| Magdalena Peak Rhyolite
|
formation
|
|
|
|
|
|
|
| Magothy Formation
|
formation
|
|
|
|
|
Raritan Formation
|
|
| Mahantango Formation
|
formation
|
|
|
|
Harrell Formation
|
Marcellus Formation
|
|
| Mahoning Formation
|
formation
|
|
|
|
|
|
|
| Main Street Limestone
|
formation
|
|
|
|
|
|
|
| Makah Formation
|
formation
|
|
|
|
|
|
|
| Malone Formation
|
formation
|
|
|
|
|
|
|
| Manakacha Formation
|
formation
|
|
|
|
Wescogame Formation
|
Watahomigi Formation
|
|
| Manasquan Formation
|
formation
|
|
|
|
Shark River Formation
|
|
|
| Manassas Sandstone
|
formation
|
|
|
|
Balls Bluff Siltstone
|
|
|
| Mancos Group
|
formation
|
|
|
|
|
|
|
| Mancos Shale
|
formation
|
|
|
|
Mesaverde Formation
|
Dakota Formation
|
|
| Manhattan Formation
|
formation
|
|
|
|
|
|
|
| Manistique Formation
|
formation
|
|
|
|
|
|
|
| Manitou Limestone
|
formation
|
|
|
|
Harding Sandstone
|
|
|
| Manix Formation
|
formation
|
|
|
|
|
|
|
| Manlius Formation
|
formation
|
|
|
|
|
|
|
| Manlius Limestone
|
formation
|
|
|
|
Coeymans Limestone
|
|
|
| Mannie Formation
|
formation
|
|
|
|
|
|
|
| Manning Canyon Shale
|
formation
|
|
|
|
|
|
|
| Mansfield Formation
|
formation
|
|
|
|
Brazil Formation
|
Grove Church Shale
|
|
| Manzano Group
|
formation
|
|
|
|
|
|
|
| Mapleton Sandstone
|
formation
|
|
|
|
|
|
|
| Maplewood Formation
|
formation
|
|
|
|
|
|
|
| Maquoketa Formation
|
formation
|
|
|
|
|
Cape Formation
|
|
| Marathon Formation
|
formation
|
|
|
|
|
|
|
| Maravillas Formation
|
formation
|
|
|
|
|
|
|
| Marble Bluff Bed
|
formation
|
|
|
|
|
|
|
| Marble Falls Formation
|
formation
|
|
|
|
|
|
|
| Marcellus Formation
|
formation
|
|
Eifelian
|
Givetian
|
Mahantango Formation
|
Onondaga Formation
|
|
| Marianna Limestone
|
formation
|
|
|
|
|
|
|
| Marias River Shale
|
formation
|
|
|
|
|
|
|
| Maricopa Shale
|
formation
|
|
|
|
|
|
|
| Marjum Formation
|
formation
|
|
|
|
|
|
|
| Marjum Limestone
|
formation
|
|
|
|
|
|
|
| Markham Mill Formation
|
formation
|
|
|
|
|
|
|
| Marks Head Formation
|
formation
|
|
|
|
|
|
|
| Marlbrook Marl
|
formation
|
|
|
|
Saratoga Chalk
|
Annona Chalk
|
|
| Marmaton Group
|
formation
|
|
|
|
|
|
|
| Maroon Formation
|
formation
|
|
|
|
|
|
|
| Marquette Range Supergroup
|
supergroup
|
|
|
|
|
|
|
| Marshall Formation
|
formation
|
|
|
|
|
|
|
| Marshalltown Formation
|
formation
|
|
|
|
Wenonah Formation
|
Englishtown Formation
|
|
| Marsland Beds
|
formation
|
|
|
|
|
|
|
| Marsland Formation
|
formation
|
|
|
|
|
|
|
| Martin Bridge Limestone
|
formation
|
|
|
|
|
|
|
| Martin Canyon Beds
|
formation
|
|
|
|
|
|
|
| Martin Formation
|
formation
|
|
|
|
|
|
|
| Martinez Formation
|
formation
|
|
|
|
Tejon Formation
|
Chico Formation
|
|
| Martinsburg Formation
|
formation
|
|
|
|
Juniata Formation
|
|
|
| Marvel Limestone
|
formation
|
|
|
|
|
|
|
| Mary Lee Formation
|
formation
|
|
|
|
|
|
|
| Maryville Limestone
|
formation
|
|
|
|
|
|
|
| Mascall Formation
|
formation
|
|
|
|
Rattlesnake Formation
|
|
|
| Mashel Formation
|
formation
|
|
|
|
|
|
|
| Masonic Park Tuff
|
formation
|
|
|
|
|
|
|
| Massie Shale
|
formation
|
|
|
|
Euphemia Dolomite
|
Laurel Limestone
|
|
| Masuk Formation
|
formation
|
|
|
|
|
|
|
| Matanuska Formation
|
formation
|
|
|
|
|
|
|
| Matawan Formation
|
formation
|
|
|
|
|
|
|
| Matfield Shale
|
formation
|
|
|
|
|
|
|
| Matilde Formation
|
formation
|
|
|
|
|
|
|
| Matilija Sandstone
|
formation
|
|
|
|
Cozy Dell Shale
|
Juncal Formation
|
|
| Mattoon Formation
|
formation
|
|
|
|
|
Bond Formation
|
|
| Mauch Chunk Formation
|
formation
|
|
|
|
Pottsville Formation
|
Pocono Formation
|
|
| Maudlow Formation
|
formation
|
|
|
|
|
|
|
| Maury Formation
|
formation
|
|
|
|
|
|
|
| Maxville Limestone
|
formation
|
|
|
|
|
Logan Formation
|
|
| Maynes Creek Formation
|
formation
|
|
|
|
|
|
|
| Maysville Limestone
|
formation
|
|
|
|
|
|
|
| Mayville Formation
|
formation
|
|
|
|
|
|
|
| Mazarn Shale
|
formation
|
|
|
|
Blakely Sandstone
|
Crystal Mountain Sandstone
|
|
| Mazatzal Quartzite
|
formation
|
|
|
|
|
|
|
| Mazourka Formation
|
formation
|
|
|
|
|
|
|
| Mazourka Group
|
group
|
|
|
|
|
|
|
| McAlester Formation
|
formation
|
|
|
|
Savanna Sandstone
|
Hartshorne Formation
|
|
| McBean Formation
|
formation
|
|
|
|
|
|
|
| McCann Hill Chert
|
formation
|
|
|
|
|
|
|
| McCarthy Formation
|
formation
|
|
|
|
|
|
|
| McCloud Limestone
|
formation
|
|
|
|
|
|
|
| McColley Canyon Formation
|
formation
|
|
|
|
|
|
|
| McCoy Creek Group
|
group
|
|
|
|
|
|
|
| McCoy Formation
|
formation
|
|
|
|
|
|
|
| McCoy Mountains Formation
|
formation
|
|
|
|
|
|
|
| McCraney Limestone
|
formation
|
|
|
|
|
|
|
| McCully Formation
|
formation
|
|
|
|
|
|
|
| McGowan Creek Formation
|
formation
|
|
|
|
|
|
|
| McGregor Formation
|
formation
|
|
|
|
|
|
|
| McKay Formation
|
formation
|
|
|
|
|
|
|
| McKelligon Canyon Formation
|
formation
|
|
|
|
|
|
|
| McKenzie Formation
|
formation
|
|
|
|
Williamsport Formation
|
Rochester Shale
|
|
| McLeansboro Group
|
formation
|
|
|
|
|
|
|
| McLeansbough Formation
|
formation
|
|
|
|
|
|
|
| McLish Formation
|
formation
|
|
|
|
|
|
|
| McMillan Formation
|
formation
|
|
|
|
|
|
|
| McMonnigal Limestone
|
formation
|
|
|
|
|
|
|
| McPherson Formation
|
formation
|
|
|
|
|
|
|
| McRae Formation
|
formation
|
|
|
|
|
|
|
| Meade Formation
|
formation
|
|
|
|
|
|
|
| Meade Peak Formation
|
formation
|
|
|
|
|
|
|
| Meagher Formation
|
formation
|
|
|
|
|
|
|
| Mechum River Formation
|
formation
|
|
|
|
|
|
|
| Medicine Bow Formation
|
formation
|
|
|
|
|
|
|
| Medina Formation
|
formation
|
|
|
|
|
|
|
| Medina Group
|
formation
|
|
Silurian
Llandovery
|
|
Clinton Formation
|
Queenston Shale
|
|
| Meduxnekeag Group
|
group
|
|
|
|
|
|
|
| Meeteetse Formation
|
formation
|
|
|
|
Lance Formation
|
Mesaverde Formation
|
|
| Meganos Formation
|
formation
|
|
|
|
|
|
|
| Mehrten Formation
|
formation
|
|
|
|
|
|
|
| Melones Formation
|
formation
|
|
|
|
|
|
|
| Melville Formation
|
formation
|
|
|
|
|
|
|
| Memorial Formation
|
formation
|
|
|
|
|
|
|
| Menefee Formation
|
formation
|
|
|
|
Cliff House Sandstone
|
Point Lookout Sandstone
|
|
| Menominee Group
|
group
|
|
|
|
|
|
|
| Merced Formation
|
formation
|
|
|
|
|
bedrock
|
|
| Mercer Formation
|
formation
|
|
|
|
|
|
|
| Merchantville Formation
|
formation
|
|
|
|
Woodbury Formation
|
|
|
| Merrimack Group
|
group
|
|
|
|
|
|
|
| Mesa Rica Formation
|
formation
|
|
|
|
|
|
|
| Mesa Rica Sandstone
|
formation
|
|
|
|
Pajarito Formation
|
|
|
| Mesaverde Formation
|
formation
|
|
|
|
Meeteetse Formation
|
Cody Shale
|
|
| Mesaverde Group
|
group
|
|
|
|
|
|
|
| Mescal Limestone
|
formation
|
|
|
|
|
|
|
| Mesilla Valley Shale
|
formation
|
|
|
|
|
|
|
| Meteetse Formation
|
formation
|
|
|
|
|
|
|
| Miami Oolite
|
formation
|
|
|
|
|
|
|
| Miamitown Formation
|
formation
|
|
|
|
Grant Lake Formation
|
Fairview Formation
|
|
| Michigan Formation
|
formation
|
|
|
|
Bayport Limestone
|
Marshall Sandstone
|
|
| Middendorf Formation
|
formation
|
|
|
|
|
|
|
| Middle Canyon Formation
|
formation
|
|
|
|
|
|
|
| Middle Park Formation
|
formation
|
|
|
|
|
|
|
| Middle Run Formation
|
formation
|
|
|
|
Mount Simon Sandstone
|
|
|
| Middlegate Formation
|
formation
|
|
|
|
|
|
|
| Middlesex Shale
|
formation
|
|
|
|
Cashaqua Shale
|
|
|
| Midland Formation
|
formation
|
|
|
|
|
|
|
| Midway Formation
|
formation
|
|
|
|
|
|
|
| Mifflin Formation
|
formation
|
|
|
|
|
|
|
| Mifflintown Formation
|
formation
|
|
|
|
Williamsport Formation
|
Keefer Sandstone
|
|
| Milagros Formation
|
formation
|
|
|
|
|
|
|
| Milk Creek Formation
|
formation
|
|
|
|
|
|
|
| Milligen Formation
|
formation
|
|
|
|
|
|
|
| Millingport Formation
|
formation
|
|
|
|
|
|
|
| Millsap Lake Formation
|
formation
|
|
|
|
|
|
|
| Millsap Lake Group
|
formation
|
|
|
|
|
|
|
| Milwaukee Formation
|
formation
|
|
|
|
|
|
|
| Mineola Limestone
|
formation
|
|
|
|
|
|
|
| Miner Creek Formation
|
formation
|
|
|
|
|
|
|
| Mineral Fork Formation
|
formation
|
|
|
|
|
|
|
| Mineral Wells Formation
|
formation
|
|
|
|
|
|
|
| Mingus Formation
|
formation
|
|
|
|
|
|
|
| Minnekahta Formation
|
formation
|
|
|
|
|
|
|
| Minnelusa Formation
|
formation
|
|
|
|
|
|
|
| Mint Canyon Formation
|
formation
|
|
|
|
|
Tick Canyon Formation
|
|
| Mint Spring Marl
|
formation
|
|
|
|
|
|
|
| Minturn Formation
|
formation
|
|
|
|
|
|
|
| Miramar Formation
|
formation
|
|
|
|
|
|
|
| Mission Argillite
|
formation
|
|
|
|
|
|
|
| Mission Canyon Formation
|
formation
|
|
|
|
|
|
|
| Mission Valley Formation
|
formation
|
|
|
|
Pomerado Conglomerate
|
Stadium Conglomerate
|
|
| Missisquoi Formation
|
formation
|
|
|
|
|
|
|
| Missoula Group
|
group
|
|
|
|
|
|
|
| Missouri Mountain Shale
|
formation
|
|
|
|
|
Blaylock Sandstone
|
|
| Moccasin Formation
|
formation
|
|
|
|
|
|
|
| Moccasin Springs Formation
|
formation
|
|
|
|
Bailey Limestone
|
St. Clair Limestone
|
|
| Modelo Formation
|
formation
|
|
|
|
|
|
|
| Modin Formation
|
formation
|
|
|
|
|
|
|
| Moenave Formation
|
formation
|
|
|
|
|
|
|
| Moenkopi Formation
|
formation
|
|
|
|
Chinle Formation
|
Kaibab Limestone
|
|
| Mojado Formation
|
formation
|
|
|
|
|
|
|
| Moleen Formation
|
formation
|
|
|
|
|
|
|
| Molly Gibson Formation
|
formation
|
|
|
|
|
|
|
| Mona Formation
|
formation
|
|
|
|
|
|
|
| Monarch Mill Formation
|
formation
|
|
|
|
|
|
|
| Monkton Quartzite
|
formation
|
|
|
|
|
|
|
| Monmouth Formation
|
formation
|
|
|
|
|
|
|
| Monocline Valley Formation
|
formation
|
|
|
|
|
|
|
| Monola Formation
|
formation
|
|
|
|
|
|
|
| Monongahela Formation
|
formation
|
|
|
|
Washington Formation
|
Casselman Formation
|
|
| Monongahela Group
|
group
|
|
|
|
Dunkard Group
|
Conemaugh Group
|
|
| Monotony Tuff
|
formation
|
|
|
|
|
|
|
| Monroe Canyon Formation
|
formation
|
|
|
|
|
|
|
| Monroe Creek Formation
|
formation
|
|
|
|
|
|
|
| Montana Formation
|
formation
|
|
|
|
|
|
|
| Montana Group
|
group
|
|
|
|
|
Colorado Group
|
|
| Monte Cristo Group
|
group
|
|
|
|
|
|
|
| Monteagle Limestone
|
formation
|
|
|
|
|
|
|
| Monterey Formation
|
formation
|
|
|
|
Sisquoc Formation
|
Rincon Formation
|
|
| Monterey Shale
|
formation
|
|
|
|
|
|
|
| Montesano Formation
|
formation
|
|
|
|
|
|
|
| Montezuma Formation
|
formation
|
|
|
|
|
|
|
| Montgomery Creek Formation
|
formation
|
|
|
|
|
|
|
| Montgomery Limestone
|
formation
|
|
|
|
|
|
|
| Montoya Group
|
formation
|
|
|
|
|
|
|
| Moodys Branch Formation
|
formation
|
|
|
|
Yazoo Clay
|
Cockfield Formation
|
|
| Moore Hollow Group
|
formation
|
|
|
|
|
|
|
| Moorefield Formation
|
formation
|
|
|
|
Batesville Sandstone
|
Boone Formation
|
|
| Mooreville Chalk Formation
|
formation
|
|
|
|
Demopolis Chalk Formation
|
Eutaw Formation
|
|
| Moraga Formation
|
formation
|
|
|
|
|
Orinda Formation
|
|
| Morales Formation
|
formation
|
|
|
|
|
|
|
| Moran Formation
|
formation
|
|
|
|
|
|
|
| Moreno Formation
|
formation
|
|
|
|
|
|
|
| Moreno Grande Formation
|
formation
|
|
|
|
|
|
|
| Moreno Hill Formation
|
formation
|
|
|
|
|
|
|
| Moreo Formation
|
formation
|
|
|
|
|
|
|
| Morgan Ranch Formation
|
formation
|
|
|
|
|
Coal Valley Formation
|
|
| Mormon Formation
|
formation
|
|
|
|
|
|
|
| Moroni Formation
|
formation
|
|
|
|
|
|
|
| Morrill Limestone
|
formation
|
|
|
|
|
Florena Shale
|
|
| Morrison Formation
|
formation
|
|
Kimmeridgian
|
Kimmeridgian
|
Cedar Mountain Formation
|
Summerville Formation
|
|
| Morrow Formation
|
formation
|
|
|
|
|
|
|
| Morrow Group
|
formation
|
|
|
|
Atoka Formation
|
Pitkin Formation
|
|
| Mosalem Formation
|
formation
|
|
|
|
|
|
|
| Moscow Formation
|
formation
|
|
|
|
|
Ludlowville Formation
|
|
| Mosheim Limestone
|
formation
|
|
|
|
|
|
|
| Mosley Hill Formation
|
formation
|
|
|
|
|
|
|
| Mount Auburn Formation
|
formation
|
|
|
|
|
|
|
| Mount Cowen Gneiss
|
formation
|
|
|
|
|
|
|
| Mount Dall Formation
|
formation
|
|
|
|
|
|
|
| Mount Davis Volcanics
|
formation
|
|
|
|
|
|
|
| Mount Delano Gneiss
|
formation
|
|
|
|
|
|
|
| Mount Garfield Formation
|
formation
|
|
|
|
|
|
|
| Mount Laurel Formation
|
formation
|
|
|
|
Navesink Formation
|
Wenonah Formation
|
|
| Mount Marion Formation
|
formation
|
|
|
|
|
|
|
| Mount Mazama Formation
|
formation
|
|
|
|
|
|
|
| Mount Oratia Formation
|
formation
|
|
|
|
|
|
|
| Mount Pablo Formation
|
formation
|
|
|
|
|
|
|
| Mount Rogers Formation
|
formation
|
|
|
|
|
|
|
| Mount Scott Granite
|
formation
|
|
|
|
|
|
|
| Mount Shields Formation
|
formation
|
|
|
|
|
|
|
| Mount Simon Sandstone
|
formation
|
|
|
|
Eau Claire Formation
|
|
|
| Mount Toby Formation
|
formation
|
|
|
|
|
|
|
| Mount Wallace Formation
|
formation
|
|
|
|
|
|
|
| Mount Watson Formation
|
formation
|
|
|
|
|
|
|
| Mount Wrightson Formation
|
formation
|
|
|
|
|
|
|
| Mountain City Formation
|
formation
|
|
|
|
|
Nelson Formation
|
|
| Mountain Springs Formation
|
formation
|
|
|
|
|
|
|
| Mowich Group
|
formation
|
|
|
|
|
|
|
| Mowry Formation
|
formation
|
|
|
|
|
|
|
| Mowry Shale
|
formation
|
|
|
|
|
|
|
| Moyers Formation
|
formation
|
|
|
|
|
|
|
| Mt. Eden Formation
|
formation
|
|
|
|
|
|
|
| Muav Limestone
|
formation
|
|
|
|
Temple Butte Limestone
|
Bright Angel Shale
|
|
| Mud Springs Group
|
formation
|
|
|
|
|
|
|
| Mud Springs Mountain Formation
|
formation
|
|
|
|
|
|
|
| Muddy Creek Formation
|
formation
|
|
|
|
|
Horse Spring Formation
|
|
| Muldoon Canyon Formation
|
formation
|
|
|
|
|
|
|
| Muldraugh Formation
|
formation
|
|
|
|
Harrodsburg Limestone
|
Edwardsville Formation
|
|
| Mule Spring Limestone
|
formation
|
|
|
|
|
|
|
| Muleros Formation
|
formation
|
|
|
|
|
|
|
| Mulholland Formation
|
formation
|
|
|
|
|
|
|
| Mullinix Formation
|
formation
|
|
|
|
|
|
|
| Munising Formation
|
formation
|
|
|
|
Au Train Formation
Trempealeau Formation
|
Jacobsville Sandstone
|
|
| Mural Limestone
|
formation
|
|
|
|
|
|
|
| Murderers Creek Graywacke
|
formation
|
|
|
|
|
|
|
| Murdock Mountain Formation
|
formation
|
|
|
|
|
|
|
| Murdock Station Formation
|
formation
|
|
|
|
|
|
|
| Murfreesboro Limestone
|
formation
|
|
|
|
|
|
|
| Music Mountain Formation
|
formation
|
|
|
|
|
|
|
| Myrtle Group
|
formation
|
|
|
|
|
|
|
| Nacatoch Formation
|
formation
|
|
|
|
Arkadelphia Marl
|
Saratoga Chalk
|
|
| Nacatoch Sand
|
formation
|
|
|
|
|
|
|
| Nachusa Formation
|
formation
|
|
|
|
|
|
|
| Nacimiento Formation
|
formation
|
|
|
|
|
|
|
| Naco Formation
|
formation
|
|
|
|
|
|
|
| Naco Group
|
formation
|
|
|
|
|
|
|
| Naha Alluvium
|
formation
|
|
|
|
|
|
|
| Naheola Formation
|
formation
|
|
|
|
|
|
|
| Naknek Formation
|
formation
|
|
|
|
|
|
|
| Nanafalia Formation
|
formation
|
|
|
|
|
|
|
| Nanaimo Formation
|
formation
|
|
|
|
|
|
|
| Nanaimo Group
|
formation
|
|
|
|
|
|
|
| Nanjemoy Formation
|
formation
|
|
|
|
|
|
|
| Nankoweap Formation
|
formation
|
|
|
|
Tapeats Sandstone
|
Cardenas Basalt
|
|
| Nanushuk Group
|
formation
|
|
|
|
|
|
|
| Napanee Limestone
|
formation
|
|
|
|
|
|
|
| Narragansett Bay Group
|
group
|
|
|
|
|
|
|
| Narrow Cape Formation
|
formation
|
|
|
|
|
|
|
| Nashua Formation
|
formation
|
|
|
|
|
|
|
| Natchez Formation
|
formation
|
|
|
|
|
|
|
| Natchez Pass Formation
|
formation
|
|
|
|
|
|
|
| Nation River Formation
|
formation
|
|
|
|
|
|
|
| Naturita Formation
|
formation
|
|
|
|
Mancos Shale
|
Cedar Mountain Formation
|
|
| Navajo Sandstone
|
formation
|
|
|
|
Carmel Formation
|
Kayenta Formation
|
Kayenta Formation
|
| Navajo Sandstone Group
|
formation
|
|
|
|
|
|
|
| Navarro Group
|
group
|
|
|
|
|
|
|
| Navesink Formation
|
formation
|
|
|
|
|
Mount Laurel Formation
|
|
| Neagha Shale
|
formation
|
|
|
|
|
unconformity
Thorold Sandstone
|
|
| Neahga Formation
|
formation
|
|
|
|
|
|
|
| Neal Ranch Formation
|
formation
|
|
|
|
|
|
|
| Neda Formation
|
formation
|
|
|
|
|
|
|
| Needles Range Group
|
group
formation
|
|
|
|
|
|
|
| Needmore Formation
|
formation
|
|
|
|
Marcellus Formation
|
Oriskany Formation
|
|
| Nehenta Formation
|
formation
|
|
|
|
|
|
|
| Nelagoney Formation
|
formation
|
|
|
|
|
|
|
| Nelchina River Gabbronorite
|
formation
|
|
|
|
|
|
|
| Nellie Bly Formation
|
formation
|
|
|
|
|
|
|
| Nelly Bly Formation
|
formation
|
|
|
|
|
|
|
| Nelson Formation
|
formation
|
|
|
|
Mountain City Formation
|
|
|
| Neroly Formation
|
formation
|
|
|
|
Pinole Tuff
|
|
|
| Neroly Sandstone
|
formation
|
|
|
|
|
|
|
| Neruokpuk Formation
|
formation
|
|
|
|
|
|
|
| Neslen Formation
|
formation
|
|
|
|
|
|
|
| Nestucca Formation
|
formation
|
|
|
|
|
|
|
| Neva Formation
|
formation
|
|
|
|
Eskridge Shale
|
|
|
| Nevada Formation
|
formation
|
|
|
|
|
|
|
| Nevada Group
|
formation
|
|
|
|
|
|
|
| New Albany Shale
|
formation
|
|
|
|
|
Boyle Formation
|
|
| New Bern Formation
|
formation
|
|
|
|
|
|
|
| New Egypt Formation
|
formation
|
|
|
|
|
|
|
| New Haven Formation
|
formation
|
|
|
|
|
|
|
| New London Gneiss
|
formation
|
|
|
|
|
|
|
| New Oxford Formation
|
formation
|
|
|
|
Gettysburg Formation
|
|
|
| New Providence Formation
|
formation
|
|
|
|
|
|
|
| New Providence Shale
|
formation
|
|
|
|
Spickert Knob Formation
|
Coldwater Shale
|
|
| New River Formation
|
formation
|
|
|
|
Kanawha Formation
|
Pocahontas Formation
|
|
| New Scotland Formation
|
formation
|
|
|
|
|
Kalkberg Limestone
|
|
| New York City Group
|
group
|
|
|
|
|
|
|
| Newala Formation
|
formation
|
|
|
|
|
|
|
| Newark Canyon Formation
|
formation
|
|
|
|
|
|
|
| Newark Supergroup
|
supergroup
|
|
|
|
|
|
|
| Newcastle Sandstone
|
formation
|
|
|
|
|
|
|
| Newman Formation
|
formation
|
|
|
|
|
|
|
| Neylandville Marl
|
formation
|
|
|
|
|
|
|
| Nicely Formation
|
formation
|
|
|
|
|
|
|
| Niguel Formation
|
formation
|
|
|
|
|
|
|
| Nikolai Greenstone
|
formation
|
|
|
|
|
|
|
| Ninemile Formation
|
formation
|
|
|
|
Antelope Valley Limestone
|
Goodwin Limestone
|
|
| Nineveh Formation
|
formation
|
|
|
|
|
|
|
| Niobrara Formation
|
formation
|
|
|
|
Pierre Shale
|
Carlile Formation
|
|
| Nisku Formation
|
formation
|
|
|
|
|
|
|
| Nittany Dolomite
|
formation
|
|
|
|
|
Stonehenge Limestone
|
|
| Nizina Mountain Formation
|
formation
|
|
|
|
|
|
|
| Noble Ranch Group
|
group
|
|
|
|
|
|
|
| Nocona Formation
|
formation
|
|
|
|
|
|
|
| Noh Formation
|
formation
|
|
|
|
|
|
|
| Noix Limestone
|
formation
|
|
|
|
Silurian
|
|
|
| Nolichucky Formation
|
formation
|
|
|
|
|
|
|
| Nooksack Formation
|
formation
|
|
|
|
|
|
|
| Noonday Dolomite
|
formation
|
|
|
|
|
|
|
| Nopah Formation
|
formation
|
|
|
|
|
|
|
| Norbeck Intrusive Suite
|
formation
intrusive suite
|
|
|
|
|
|
|
| Norfolk Formation
|
formation
|
|
|
|
|
|
|
| Normanskill Formation
|
formation
|
|
|
|
|
|
|
| Norphlet Formation
|
formation
|
|
|
|
|
|
|
| North Hill Group
|
formation
|
|
|
|
|
|
|
| North Horn Formation
|
formation
|
|
|
|
Flagstaff Formation
|
Price River Formation
|
|
| North Park Formation
|
formation
|
|
|
|
|
|
|
| North Shore Group
|
group
|
|
|
|
|
|
|
| North Snowy Group
|
group
|
|
|
|
|
|
|
| Northview Formation
|
formation
|
|
|
|
Pierson Limestone
|
|
|
| Norway Point Formation
|
formation
|
|
|
|
|
|
|
| Norwood Tuff
|
formation
|
|
|
|
|
|
|
| Nosoni Formation
|
formation
|
|
|
|
|
|
|
| Notch Peak Formation
|
formation
|
|
|
|
|
|
|
| Nowata Formation
|
formation
|
|
|
|
|
|
|
| Nugget Formation
|
formation
|
|
|
|
|
|
|
| Nugget Sandstone
|
formation
|
|
|
|
Carmel Formation
|
Chinle Formation
|
|
| Nuka Formation
|
formation
|
|
|
|
|
|
|
| Nye Formation
|
formation
|
|
|
|
|
|
|
| O'Neill Formation
|
formation
|
|
|
|
|
|
|
| Oak Creek Formation
|
formation
|
|
|
|
|
|
|
| Oak Grove Formation
|
formation
|
|
|
|
|
|
|
| Oak Orchard Formation
|
formation
|
|
|
|
|
|
|
| Oakville Formation
|
formation
|
|
|
|
|
|
|
| Obregon Formation
|
formation
|
|
|
|
|
|
|
| Ocala Limestone
|
formation
|
|
|
|
Suwannee Limestone
Arcadia Formation
|
Avon Park Formation
|
|
| Ocala Platform
|
formation
|
|
|
|
|
|
|
| Ochelata Group
|
formation
|
|
|
|
|
|
|
| Oclese Sand Formation
|
formation
|
|
|
|
|
|
|
| Ocoee Supergroup
|
supergroup
|
|
|
|
|
|
|
| Ocotillo Formation
|
formation
|
|
|
|
Palm Spring Formation
|
Brawley Formation
|
|
| Odenville Formation
|
formation
|
|
|
|
|
|
|
| Oella Formation
|
formation
|
|
|
|
|
|
|
| Offley Island Formation
|
formation
|
|
|
|
|
|
|
| Ogallala Formation
|
formation
|
|
|
|
|
|
|
| Ogallala Group
|
formation
|
|
|
|
|
|
|
| Ogdensburg Formation
|
formation
|
|
|
|
|
|
|
| Ogilvie Formation
|
formation
|
|
|
|
|
|
|
| Ogotoruk Formation
|
formation
|
|
|
|
|
Shublik Formation
|
|
| Ohio Creek Formation
|
formation
|
|
|
|
|
|
|
| Ohio Shale
|
formation
|
|
|
|
Bedford Shale
|
Java Formation
|
|
| Oil Creek Formation
|
formation
|
|
|
|
|
|
|
| Ojinaga Formation
|
formation
|
|
|
|
|
|
|
| Ojo Alamo Formation
|
formation
|
|
|
|
Nacimiento Formation
|
Kirtland Formation
|
|
| Okpikruak Formation
|
formation
|
|
|
|
|
|
|
| Olcott Formation
|
formation
|
|
|
|
|
|
|
| Old Breastworks Formation
|
formation
|
|
|
|
|
|
|
| Old Church Formation
|
formation
|
|
|
|
|
|
|
| Old Dominion Limestone
|
formation
|
|
|
|
|
|
|
| Old Point Formation
|
formation
|
|
|
|
|
|
|
| Old Port Formation
|
formation
|
|
|
|
Onondaga Formation
|
Keyser Formation
|
|
| Olentangy Shale
|
formation
|
|
|
|
Ohio Shale
|
Hillsboro Sandstone
|
|
| Omadi Formation
|
formation
|
|
|
|
|
|
|
| Onaga Formation
|
formation
|
|
|
|
|
|
|
| Onaga Shale
|
formation
|
|
|
|
|
|
|
| Onate Formation
|
formation
|
|
|
|
|
|
|
| Oneida Formation
|
formation
|
|
|
|
|
|
|
| Oneonta Formation
|
formation
|
|
|
|
|
|
|
| Oneota Formation
|
formation
|
|
|
|
Shakopee Formation
|
Jordan Sandstone
|
|
| Ono Formation
|
formation
|
|
|
|
|
|
|
| Onondaga Formation
|
formation
escarpment
|
|
|
|
Marcellus Formation
|
Helderberg Group
|
|
| Onteora Formation
|
formation
|
|
|
|
|
|
|
| Onyx Marble
|
formation
|
|
|
|
|
|
|
| Oologah Formation
|
formation
|
|
|
|
|
|
|
| Oologah Formation
|
formation
|
|
|
|
|
|
|
| Open Door Limestone
|
formation
|
|
|
|
|
|
|
| Opohonga Formation
|
formation
|
|
|
|
|
|
|
| Oquirrh Formation
|
formation
|
|
|
|
|
|
|
| Oquirrh Group
|
group
|
|
|
|
|
|
|
| Oranda Formation
|
formation
|
|
|
|
|
|
|
| Orca Formation
|
formation
|
|
|
|
|
|
|
| Orchard Creek Shale
|
formation
|
|
|
|
|
|
|
| Oread Formation
|
formation
|
|
|
|
|
|
|
| Oread Limestone
|
formation
|
|
|
|
|
|
|
| Oregon Formation
|
formation
|
|
|
|
Tyrone Limestone
|
Camp Nelson Limestone
|
|
| Oregonia Formation
|
formation
|
|
|
|
|
|
|
| Organ Rock Formation
|
formation
member
|
|
|
|
White Rim Sandstone
|
Cedar Mesa Sandstone
|
|
| Orinda Formation
|
formation
|
|
|
|
Moraga Formation
|
|
|
| Oriskany Formation
|
formation
|
|
|
|
Bois Blanc Formation
|
Helderberg Group
|
|
| Oro Loma Formation
|
formation
|
|
|
|
|
|
|
| Orocopia Schist
|
formation
|
|
|
|
|
|
|
| Oronto Group
|
group
|
|
|
|
Bayfield group
|
|
|
| Orr Formation
|
formation
|
|
|
|
|
|
|
| Osbourne Canyon Formation
|
formation
|
|
|
|
|
|
|
| Osceola Argillite
|
formation
|
|
|
|
|
|
|
| Osgood Formation
|
formation
|
|
|
|
Laurel Limestone
|
Brassfield Formation
|
|
| Osgood Mountain Quartzite
|
formation
|
|
|
|
|
|
|
| Osha Canyon Formation
|
formation
|
|
|
|
Sandia Formation
|
Log Springs Formation
|
|
| Osobb Formation
|
formation
|
|
|
|
|
|
|
| Oswayo Formation
|
formation
|
|
|
|
Medina Formation
|
|
|
| Oswayo Sandstone
|
formation
|
|
|
|
|
|
|
| Oswego Formation
|
formation
|
|
|
|
Tuscarora Formation
|
Juniata Formation
|
|
| Otay Formation
|
formation
|
|
|
|
|
Sweetwater Formation
|
|
| Otter Point Formation
|
formation
|
|
|
|
|
|
|
| Otterdale Formation
|
formation
|
|
|
|
|
|
|
| Otuk Formation
|
formation
|
|
|
|
|
|
|
| Ouray Formation
|
formation
|
|
|
|
|
|
|
| Owens Valley Group
|
formation
|
|
|
|
|
|
|
| Owl Creek Formation
|
formation
|
|
|
|
|
|
|
| Oxyoke Canyon Formation
|
formation
|
|
|
|
|
Sadler Ranch Formation
|
|
| Ozan Formation
|
formation
|
|
|
|
Annona Chalk
|
Austin Chalk
|
|
| Pablo Formation
|
formation
|
|
|
|
|
|
|
| Pacheco Formation
|
formation
|
|
|
|
|
|
|
| Pachuta Marl
|
formation
|
|
|
|
|
|
|
| Packard Wash Formation
|
formation
|
|
|
|
|
Lori Formation
|
|
| Padre Formation
|
formation
|
|
|
|
|
|
|
| Page Sandstone
|
formation
|
|
|
|
|
|
|
| Pagoda Formation
|
formation
|
|
|
|
|
|
|
| Paha Sapa Limestone
|
formation
|
|
|
|
|
|
|
| Pahala Formation
|
formation
|
|
|
|
|
|
|
| Pahranagat Formation
|
formation
|
|
|
|
|
|
|
| Pahrump Group
|
group
|
|
|
|
|
|
|
| Pahrump Hills Shale
|
formation
|
|
|
|
Jangle Limestone
|
Red Pass Limestone
|
|
| Pahute Mesa Tuff
|
formation
|
|
|
|
Trail Ridge Tuff
|
Rocket Wash Tuff
|
|
| Paint Creek Formation
|
formation
|
|
|
|
|
|
|
| Paint River Group
|
group
|
|
|
|
|
|
|
| Paintbrush Group
|
group
|
|
|
|
|
|
|
| Pajarito Formation
|
formation
|
|
|
|
|
Mesa Rica Sandstone
|
|
| Pakoon Limestone
|
formation
|
|
|
|
|
|
|
| Palestine Formation
|
formation
|
|
|
|
Clore Formation
|
Menard Limestone
|
|
| Palm Peak Formation
|
formation
|
|
|
|
|
|
|
| Palm Spring Formation
|
formation
|
|
|
|
|
Imperial Formation
|
|
| Palmer gneiss
|
formation
|
|
|
|
|
|
|
| Palo Pinto Formation
|
formation
|
|
|
|
|
|
|
| Palomas Formation
|
formation
|
|
|
|
|
|
|
| Palos Verdes Sand
|
formation
|
|
|
|
|
|
|
| Paluxy Formation
|
formation
|
|
|
|
|
Glen Rose Formation
|
|
| Pamlico Formation
|
formation
|
|
|
|
|
|
|
| Panaca Formation
|
formation
|
|
|
|
|
|
|
| Pancho Rico Formation
|
formation
|
|
|
|
|
|
|
| Panoche Formation
|
formation
|
|
|
|
|
|
|
| Panther Mountain Formation
|
formation
|
|
|
|
|
|
|
| Panther Seep Formation
|
formation
|
|
|
|
|
|
|
| Parachucla Formation
|
formation
|
|
|
|
|
|
|
| Paradise Formation
|
formation
|
|
|
|
|
|
|
| Paradox Formation
|
formation
|
|
|
|
|
|
|
| Paragon Formation
|
formation
|
|
|
|
|
|
|
| Parajito Formation
|
formation
|
|
|
|
|
|
|
| Parchucla Formation
|
formation
|
|
|
|
|
|
|
| Park City Formation
|
formation
|
|
|
|
|
|
|
| Park Shale
|
formation
|
|
|
|
|
|
|
| Parker Slate
|
formation
|
|
|
|
|
|
|
| Parkers Ferry Formation
|
formation
|
|
|
|
|
|
|
| Parkwood Formation
|
formation
|
|
|
|
Pottsville Formation
|
|
|
| Paskenta Formation
|
formation
|
|
|
|
|
|
|
| Paso Robles Formation
|
formation
|
|
|
|
|
|
|
| Pass Peak Formation
|
formation
|
|
|
|
|
|
|
| Passaic Formation
|
formation
|
|
|
|
|
Lockatong Formation
|
|
| Passamari Formation
|
formation
|
|
|
|
|
|
|
| Patapsco Formation
|
formation
|
|
|
|
|
|
|
| Patoka Formation
|
formation
|
|
|
|
Bond Formation
|
Shelburn Formation
|
|
| Patsy Mine Volcanics
|
formation
|
|
|
|
|
|
|
| Patuxent Formation
|
formation
|
|
|
|
Arundel Formation
|
basement
|
|
| Pauba Formation
|
formation
|
|
|
|
|
|
|
| Paw Paw Formation
|
formation
|
|
|
|
|
|
|
| Pawnee Creek Beds
|
formation
|
|
|
|
|
|
|
| Pawnee Formation
|
formation
|
|
|
|
|
|
|
| Payton Ranch Limestone
|
formation
|
|
|
|
|
|
|
| Peace River Formation
|
formation
|
|
|
|
|
|
|
| Peace Valley Beds Formation
|
formation
|
|
|
|
|
|
|
| Peach Spring Tuff
|
formation
|
|
|
|
|
|
|
| Pease River Group
|
formation
|
|
|
|
|
|
|
| Pecan Gap Chalk
|
formation
|
|
|
|
|
|
|
| Pecatonica Formation
|
formation
|
|
|
|
Plattin Limestone
|
Joachim Dolomite
|
|
| Pedee Group
|
formation
|
|
|
|
|
|
|
| Pedro Arroyo Formation
|
formation
|
|
|
|
|
|
|
| Peebles Dolomite
|
formation
|
|
|
|
Greenfield Dolomite
|
Lilley Formation
|
|
| Peedee Formation
|
formation
|
|
|
|
|
Black Creek Formation
|
|
| Pekin Formation
|
formation
|
|
|
|
|
|
|
| Pella Formation
|
formation
|
|
|
|
|
|
|
| Pelona Schist
|
formation
|
|
|
|
|
|
|
| Pen Formation
|
formation
|
|
|
|
|
|
|
| Penfield Dolomite
|
formation
member
|
|
|
|
|
|
|
| Penholloway Formation
|
formation
|
|
|
|
|
|
|
| Penn Yan Formation
|
formation
|
|
|
|
|
|
|
| Penney Farms Formation
|
formation
|
|
|
|
|
|
|
| Pennington Formation
|
formation
|
|
|
|
|
|
|
| Pensacola Formation
|
formation
|
|
|
|
|
|
|
| Pentagon Formation
|
formation
|
|
|
|
|
|
|
| Penters Chert
|
formation
|
|
|
|
Clifty Limestone
|
Lafferty Limestone
|
|
| Pentremital Limestone Group
|
formation
|
|
|
|
|
|
|
| Pepino Formation
|
formation
|
|
|
|
|
|
|
| Pepper Shale
|
formation
|
|
|
|
|
|
|
| Pequop Formation
|
formation
|
|
|
|
|
|
|
| Peratrovich Formation
|
formation
|
|
|
|
|
|
|
| Percha Formation
|
formation
|
|
|
|
|
|
|
| Percha Shale
|
formation
|
|
|
|
|
|
|
| Perham Formation
|
formation
|
|
|
|
|
|
|
| Perkins Canyon Formation
|
formation
|
|
|
|
|
|
|
| Perry Canyon Formation
|
formation
|
|
|
|
|
|
|
| Pershing Ridge Group
|
group
|
|
|
|
|
|
|
| Perth Limestone
|
formation
|
|
|
|
|
|
|
| Petaluma Formation
|
formation
|
|
|
|
|
|
|
| Petersburg Formation
|
formation
|
|
|
|
Dugger Formation
|
Linton Formation
|
|
| Peterson Creek Beds
|
formation
|
|
|
|
|
|
|
| Petosky Limestone
|
formation
|
|
|
|
|
|
|
| Petrolia Formation
|
formation
|
|
|
|
Twin Mountains Formation
|
|
|
| Pewee Coal
|
formation
|
|
|
|
|
|
|
| Pflugerville Formation
|
formation
|
|
|
|
|
|
|
| Phelan Creek Formation
|
formation
|
|
|
|
|
|
|
| Phi Kappa Formation
|
formation
|
|
|
|
|
|
|
| Phosphoria Formation
|
formation
|
|
|
|
Dinwoody Formation
|
Casper Formation
|
|
| Piapi Canyon Formation
|
formation
|
|
|
|
|
|
|
| Pico Formation
|
formation
|
|
|
|
|
Repetto Formation
|
|
| Picture Gorge Basalt
|
formation
|
|
|
|
|
|
|
| Pictured Cliffs Formation
|
formation
|
|
|
|
Fruitland Formation
|
Lewis Shale
|
|
| Picuris Formation
|
formation
|
|
|
|
|
|
|
| Piedra Rhyolite
|
formation
|
|
|
|
|
|
|
| Pierce Limestone
|
formation
|
|
|
|
|
|
|
| Piermont Formation
|
formation
|
|
|
|
|
|
|
| Pierre Formation
|
formation
|
|
|
|
|
|
|
| Pierre Shale
|
formation
|
|
|
|
Fox Hills Formation
|
Niobrara Formation
|
|
| Pierson Limestone
|
formation
|
|
|
|
Reeds Spring Formation
|
Northview Formation
|
|
| Pigeon Point Formation
|
formation
|
|
|
|
|
|
|
| Pilgrim Formation
|
formation
|
|
|
|
|
|
|
| Pillsbury Formation
|
formation
|
|
|
|
|
|
|
| Pillsbury Shale
|
formation
|
|
|
|
|
|
|
| Pilot Shale
|
formation
|
|
|
|
|
|
|
| Pine Hill Formation
|
formation
|
|
|
|
|
|
|
| Pine Hollow Formation
|
formation
|
|
|
|
|
|
|
| Pine Island Shale
|
formation
|
|
|
|
|
|
|
| Pine Mountain Group
|
group
|
|
|
|
|
|
|
| Pine Ridge Sandstone
|
formation
|
|
|
|
|
|
|
| Pinecrest Formation
|
formation
|
|
|
|
|
|
|
| Pinetop Formation
|
formation
|
|
|
|
|
|
|
| Piney Point Formation
|
formation
|
|
|
|
|
|
|
| Pinkerton Trail Formation
|
formation
|
|
|
|
|
|
|
| Pinney Hollow Formation
|
formation
|
|
|
|
|
|
|
| Pinole Tuff
|
formation
|
|
|
|
Orinda Formation
|
Neroly Formation
|
|
| Pinyon Conglomerate
|
formation
|
|
|
|
|
|
|
| Pinyon Peak Limestone
|
formation
|
|
|
|
|
|
|
| Pioche Formation
|
formation
|
|
|
|
|
|
|
| Pismo Formation
|
formation
|
|
|
|
|
|
|
| Pit Formation
|
formation
|
|
|
|
|
|
|
| Pitahaya Formation
|
formation
|
|
|
|
|
|
|
| Pitchfork Formation
|
formation
|
|
|
|
|
|
|
| Pitkin Formation
|
formation
|
|
|
|
Hale Formation
|
Fayetteville Shale
|
|
| Pittsburg Bluff Formation
|
formation
|
|
|
|
|
|
|
| Pittsburgh Formation
|
formation
|
|
|
|
|
|
|
| Piute Formation
|
formation
|
|
|
|
|
|
|
| Placer River Silt
|
formation
|
|
|
|
|
|
|
| Plainview Formation
|
formation
|
|
|
|
|
|
|
| Platteville Group
|
group
|
|
|
|
|
|
|
| Platteville Limestone
|
formation
group
|
|
|
|
Decorah Shale
|
Glenwood Formation
|
|
| Plattin Limestone
|
formation
|
|
|
|
Kimmswick Limestone
|
Joachim Dolomite
|
|
| Plattsburg Formation
|
formation
|
|
|
|
|
|
|
| Pleasant Hill Limestone
|
formation
|
|
|
|
|
Waynesboro Formation
|
|
| Pleasant Mills Formation
|
formation
|
|
|
|
Wabash Formation
|
Salamonie Dolomite
|
|
| Pleasanton Group
|
formation
|
|
|
|
|
|
|
| Pleasants Sandstone
|
formation
|
|
|
|
|
|
|
| Pleito Formation
|
formation
|
|
|
|
|
|
|
| Plum Brook Shale
|
formation
|
|
|
|
Prout Limestone
|
Delaware Limestone
|
|
| Plush Ranch Formation
|
formation
|
|
|
|
|
|
|
| Plympton Formation
|
formation
|
|
|
|
|
|
|
| Pocahontas Formation
|
formation
|
|
|
|
New River Formation
|
Bluestone Formation
|
|
| Pocatello Formation
|
formation
|
|
|
|
|
|
|
| Pocono Formation
|
formation
|
|
|
|
Mauch Chunk Formation
|
Catskill Formation
|
|
| Pocono Mountain Formation
|
formation
|
|
|
|
|
|
|
| Pogonip Group
|
group
|
|
|
|
Copenhagen Formation
|
Windfall Formation
|
|
| Point Loma Formation
|
formation
|
|
|
|
Cabrillo Formation
|
|
|
| Point Lookout Formation
|
formation
|
|
|
|
|
|
|
| Point Lookout Sandstone
|
formation
|
|
|
|
|
Crevasse Canyon Formation
|
|
| Point Pleasant Formation
|
formation
|
|
|
|
Cincinnati Group
Kope Formation
|
Lexington Limestone
Trenton Limestone
|
|
| Pointe aux Chenes Formation
|
formation
|
|
|
|
St. Ignace Dolomite
|
Bush Bay Formation
|
|
| Poison Canyon Formation
|
formation
|
|
|
|
|
|
|
| Poison Creek Formation
|
formation
|
|
|
|
|
|
|
| Polecat Bench Formation
|
formation
|
|
|
|
|
|
|
| Poleta Formation
|
formation
|
|
|
|
Harkless Formation
|
Campito Formation
|
|
| Polk Creek Shale
|
formation
|
|
|
|
Blaylock Sandstone
|
Bigfork Chert
|
|
| Pollocksville Formation
|
formation
|
|
|
|
|
|
|
| Pomerado Conglomerate
|
formation
|
|
|
|
|
Mission Valley Formation
|
|
| Ponce Limestone
|
formation
|
|
|
|
|
|
|
| Pondville Conglomerate
|
formation
|
|
|
|
|
|
|
| Pontotoc Group
|
group
|
|
|
|
|
|
|
| Pony Trail Group
|
group
|
|
|
|
|
|
|
| Popo Agie Formation
|
formation
|
|
|
|
|
Gartra Formation
|
|
| Popotosa Formation
|
formation
|
|
|
|
|
|
|
| Popovich Formation
|
formation
|
|
|
|
|
|
|
| Port Clarence Limestone
|
formation
|
|
|
|
|
|
|
| Port Orford Formation
|
formation
|
|
|
|
|
|
|
| Port Refugio Formation
|
formation
|
|
|
|
|
|
|
| Porter Shale
|
formation
|
|
|
|
|
|
|
| Porters Creek Formation
|
formation
|
|
|
|
|
Kincaid Formation
|
|
| Portersville Limestone
|
formation
|
|
|
|
|
|
|
| Portland Formation
|
formation
|
|
|
|
|
|
|
| Portuguese Springs Formation
|
formation
|
|
|
|
|
|
|
| Porvenir Formation
|
formation
|
|
|
|
Alamitos Formation
|
|
|
| Potem Formation
|
formation
|
|
|
|
|
|
|
| Potomac Formation
|
formation
|
|
|
|
|
|
|
| Potosi Formation
|
formation
|
|
|
|
Eminence Formation
|
Davis Formation
|
|
| Potsdam Sandstone
|
formation
|
|
|
|
|
|
|
| Potter Farm Formation
|
formation
|
|
|
|
|
|
|
| Pottsville Formation
|
formation
|
|
|
|
|
Coldwater Shale
|
|
| Poul Creek Formation
|
formation
|
|
|
|
|
|
|
| Poverty Flat Sandstone
|
formation
|
|
|
|
|
|
|
| Poway Group
|
group
|
|
|
|
|
|
|
| Powder Mill Group
|
group
|
|
|
|
|
|
|
| Powell Formation
|
formation
|
|
|
|
Everton Formation
|
Cotter Formation
|
|
| Power Glen Shale
|
formation
|
|
|
|
Devils Hole Sandstone
|
Whirlpool Sandstone
|
|
| Pozas Formation
|
formation
|
|
|
|
|
|
|
| Prairie Bluff Chalk
|
formation
|
|
|
|
|
|
|
| Prairie Bluff Chalk Formation
|
formation
|
|
|
|
|
Ripley Formation
|
|
| Prairie Evaporite Formation
|
formation
|
|
|
|
Elk Point Group
Manitoba Group
|
Keg River Formation
|
|
| Prairie Mountain Formation
|
formation
|
|
|
|
|
|
|
| Pratt Formation
|
formation
|
|
|
|
|
|
|
| Preble Formation
|
formation
|
|
|
|
|
|
|
| Presumpscot Formation
|
formation
|
|
|
|
|
|
|
| Priada Formation
|
formation
|
|
|
|
|
|
|
| Price Formation
|
formation
|
|
|
|
Maccrady Formation
|
Hampshire Formation
|
|
| Price River Formation
|
formation
|
|
|
|
|
|
|
| Price Sandstone
|
formation
|
|
|
|
|
|
|
| Prichard Formation
|
formation
|
|
|
|
|
|
|
| Prida Formation
|
formation
|
|
|
|
|
|
|
| Priest Canyon Formation
|
formation
|
|
|
|
|
|
|
| Prince Creek Formation
|
formation
|
|
|
|
Sagavanirktok Formation
|
Schrader Bluff Formation
|
|
| Princeton Sandstone
|
formation
|
|
|
|
Bluestone Formation
|
Hinton Formation
|
|
| Prospect Mountain Quartzite
|
formation
|
|
|
|
|
|
|
| Prosser Limestone
|
formation
|
|
|
|
|
|
|
| Providence Sand
|
formation
|
|
|
|
|
|
|
| Prow Pass Tuff
|
formation
|
|
|
|
|
Bullfrog Tuff
|
|
| Pruett Formation
|
formation
|
|
|
|
|
|
|
| Puckwunge Formation
|
formation
|
|
|
|
|
|
|
| Pueblo Formation
|
formation
|
|
|
|
|
|
|
| Puente Formation
|
formation
|
|
|
|
|
|
|
| Puente Shale
|
formation
|
|
|
|
|
|
|
| Puerco Formation
|
formation
|
|
|
|
|
|
|
| Puget Group
|
group
|
|
|
|
|
|
|
| Pumpernickel Formation
|
formation
|
|
|
|
|
|
|
| Pumpkinvine Creek Formation
|
formation
|
|
|
|
|
|
|
| Punchbowl Formation
|
formation
|
|
|
|
Crowder Formation
|
|
|
| Pungo River Formation
|
formation
|
|
|
|
|
|
|
| Purgatoire Formation
|
formation
|
|
|
|
|
|
|
| Purgatory Conglomerate
|
formation
|
|
|
|
|
|
|
| Purington Shale
|
formation
|
|
|
|
|
|
|
| Purisima Formation
|
formation
|
|
|
|
|
|
|
| Putnam Formation
|
formation
|
|
|
|
|
|
|
| Putnam Hill Formation
|
formation
|
|
|
|
|
|
|
| Puye Formation
|
formation
|
|
|
|
|
|
|
| Puye Gravel
|
formation
|
|
|
|
|
|
|
| Pybus Formation
|
formation
|
|
|
|
|
|
|
| Pyramid Formation
|
formation
|
|
|
|
|
|
|
| Pyramid Shale
|
formation
|
|
|
|
Red Pass Limestone
|
Gold Ace Limestone
|
|
| Pysht Formation
|
formation
|
|
|
|
|
|
|
| Quadrant Formation
|
formation
|
|
|
|
|
|
|
| Quanah Granite
|
formation
|
|
|
|
|
|
|
| Quantico Formation
|
formation
|
|
|
|
|
|
|
| Quartermaster Formation
|
formation
|
|
|
|
|
|
|
| Quebradillas Limestone
|
formation
|
|
|
|
|
|
|
| Queen City Formation
|
formation
|
|
|
|
|
|
|
| Quiburis Formation
|
formation
|
|
|
|
|
|
|
| Quichapa Group
|
group
|
|
|
|
|
|
|
| Quimby Formation
|
formation
|
|
|
|
Greenvale Cove Formation
|
|
|
| Quimbys Mill Formation
|
formation
|
|
|
|
|
|
|
| Quimper Sandstone Formation
|
formation
|
|
|
|
|
|
|
| Quinn River Formation
|
formation
|
|
|
|
|
|
|
| Ra Jadero Tuff
|
formation
|
|
|
|
|
|
|
| Rabbit Hill Limestone
|
formation
|
|
|
|
|
|
|
| Raccoon Creek Group
|
group
|
|
|
|
|
|
|
| Racine Dolomite
|
formation
|
|
|
|
|
|
|
| Racine Formation
|
formation
|
|
|
|
|
|
|
| Ragged Valley Shale
|
formation
|
|
|
|
|
|
|
| Raggedy Mountain Gabbro
|
group
|
|
|
|
|
|
|
| Raging River Formation
|
formation
|
|
|
|
|
|
|
| Raiff Limestone
|
formation
|
|
|
|
|
|
|
| Rail Cabin Argillite
|
formation
|
|
|
|
|
|
|
| Railroad Canyon Beds Formation
|
formation
|
|
|
|
|
|
|
| Raine Ranch Formation
|
formation
|
|
|
|
|
|
|
| Ramp Creek Formation
|
formation
|
|
|
|
Harrodsburg Limestone
|
Edwardsville Formation
|
|
| Rand Schist
|
formation
|
|
|
|
|
|
|
| Rangeley Formation
|
formation
|
|
|
|
|
Greenvale Cove Formation
|
|
| Rapson Creek Formation
|
formation
|
|
|
|
Bush Bay Formation
|
Rockview Formation
|
|
| Raritan Formation
|
formation
|
|
|
|
Magothy Formation
|
Patapsco Formation
|
|
| Raspaldo Formation
|
formation
|
|
|
|
|
|
|
| Raspberry Formation
|
formation
|
|
|
|
|
|
|
| Raton Formation
|
formation
|
|
|
|
|
|
|
| Rattlesnake Formation
|
formation
|
|
|
|
|
Mascall Formation
|
|
| Rawlins Ash Bed
|
formation
|
|
|
|
|
|
|
| Rawls Formation
|
formation
|
|
|
|
|
|
|
| Raysor Marl
|
formation
|
|
|
|
|
|
|
| Reager Ash Bed
|
formation
|
|
|
|
|
|
|
| Reamsville Ash Bed
|
formation
|
|
|
|
|
|
|
| Reany Creek Formation
|
formation
|
|
|
|
|
|
|
| Reba Formation
|
formation
|
|
|
|
|
|
|
| Red Bay Formation
|
formation
|
|
|
|
|
|
|
| Red Bluff Clay
|
formation
|
|
|
|
|
|
|
| Red Bluff Formation
|
formation
|
|
|
|
|
|
|
| Red Eagle Formation
|
formation
|
|
|
|
|
|
|
| Red Eagle Limestone
|
formation
|
|
|
|
|
|
|
| Red Glacier Formation
|
formation
|
|
|
|
|
|
|
| Red Pass Limestone
|
formation
|
|
|
|
Pahrump Hills Shale
|
Pyramid Shale
|
|
| Red Peak Formation
|
formation
|
|
|
|
|
|
|
| Red Pine Shale
|
formation
|
|
|
|
|
|
|
| Red Tanks Formation
|
formation
|
|
|
|
|
|
|
| Redding Formation
|
formation
|
|
|
|
|
|
|
| Redoak Hollow Formation
|
formation
|
|
|
|
|
|
|
| Redonda Formation
|
formation
|
|
|
|
|
|
|
| Redskin Granite
|
formation
|
|
|
|
|
|
|
| Redwall Formation
|
formation
|
|
|
|
|
|
|
| Redwall Limestone
|
formation
|
|
|
|
Surprise Canyon Formation
Supai Group
|
Temple Butte Limestone
|
|
| Reed Dolomite
|
formation
|
|
|
|
|
|
|
| Reeds Spring Formation
|
formation
|
|
|
|
|
|
|
| Reedsville Formation
|
formation
|
|
|
|
Bald Eagle Formation
|
|
|
| Reklaw Formation
|
formation
|
|
|
|
|
|
|
| Rennie Shale
|
formation
|
|
|
|
|
|
|
| Renova Formation
|
formation
|
|
|
|
|
|
|
| Renton Formation
|
formation
|
|
|
|
|
|
|
| Repetto Formation
|
formation
|
|
|
|
Pico Formation
|
|
|
| Resting Springs Formation
|
formation
|
|
|
|
|
|
|
| Reunion Creek Beds
|
formation
|
|
|
|
|
|
|
| Revett Formation
|
formation
|
|
|
|
|
|
|
| Rexroad Formation
|
formation
|
|
|
|
|
|
|
| Reynales Formation
|
formation
|
|
|
|
|
|
|
| Reynolds Limestone
|
formation
|
|
|
|
|
|
|
| Rhems Formation
|
formation
|
|
|
|
|
|
|
| Rhinestreet Shale
|
formation
|
|
|
|
|
Cashaqua Shale
|
|
| Rhode Island Formation
|
formation
|
|
|
|
|
|
|
| Rib Hill Formation
|
formation
|
|
|
|
|
|
|
| Ricardo Formation
|
formation
|
|
|
|
|
|
|
| Rich Fountain Formation
|
formation
|
|
|
|
|
|
|
| Richmond Formation
|
formation
|
|
|
|
|
|
|
| Richmond Group
|
group
|
|
|
|
|
|
|
| Ridenhower Formation
|
formation
|
|
|
|
Cypress Formation
|
Bethel Formation
|
|
| Ridley Limestone
|
formation
|
|
|
|
|
|
|
| Riepe Spring Formation
|
formation
|
|
|
|
|
|
|
| Riepetown Formation
|
formation
|
|
|
|
|
|
|
| Riley Formation
|
formation
|
|
|
|
|
|
|
| Rim Rock Sandstone
|
formation
|
|
|
|
|
|
|
| Rincon Formation
|
formation
|
|
|
|
Monterey Formation
|
Vaqueros Formation
|
|
| Rincon Valley Formation
|
formation
|
|
|
|
|
|
|
| Ringbone Formation
|
formation
|
|
|
|
|
|
|
| Ringold Formation
|
formation
|
|
|
|
|
|
|
| Rio Abajo Formation
|
formation
|
|
|
|
|
|
|
| Rio Dell Formation
|
formation
|
|
|
|
|
|
|
| Rio Guatemala Group
|
formation
|
|
|
|
|
|
|
| Ripley Formation
|
formation
|
|
|
|
Prairie Bluff Chalk Formation
|
Demopolis Chalk Formation
|
|
| Rita Blanca Formation
|
formation
|
|
|
|
|
|
|
| River Bend Formation
|
formation
|
|
|
|
|
|
|
| Riverbank Formation
|
formation
|
|
|
|
|
|
|
| Riverton Coal Formation
|
formation
|
|
|
|
|
|
|
| Riverton Formation
|
formation
|
|
|
|
|
|
|
| Road Canyon Formation
|
formation
|
|
|
|
|
|
|
| Road River Formation
|
formation
|
|
|
|
|
|
|
| Roaring Creek Coal
|
formation
|
|
|
|
|
|
|
| Roberts Mountains Formation
|
formation
|
|
|
|
Lone Mountain Dolomite
|
Hanson Creek Formation
|
|
| Robertson Formation
|
formation
|
|
|
|
|
|
|
| Robinson Formation
|
formation
|
|
|
|
|
|
|
| Roca Formation
|
formation
|
|
|
|
|
|
|
| Roca Shale
|
formation
|
|
|
|
|
|
|
| Rochdale Formation
|
formation
|
|
|
|
|
|
|
| Rochester Shale
|
formation
|
|
|
|
Gasport Dolomite
|
Cataract Group
|
|
| Rock Point Formation
|
formation
|
|
|
|
|
|
|
| Rock River Formation
|
formation
|
|
|
|
|
|
|
| Rock Springs Formation
|
formation
|
|
|
|
|
|
|
| Rock Stream Formation
|
formation
|
|
|
|
Cashaqua Shale
|
Pulteney shale
|
|
| Rockcastle Sandstone
|
formation
|
|
|
|
|
|
|
| Rockdale Formation
|
formation
|
|
|
|
|
|
|
| Rockdale Run Formation
|
formation
|
|
|
|
|
Stonehenge Limestone
|
|
| Rockdell Formation
|
formation
|
|
|
|
|
|
|
| Rocket Wash Tuff
|
formation
|
|
|
|
Pahute Mesa Tuff
|
|
|
| Rockford Limestone
|
formation
|
|
|
|
New Providence Shale
|
New Albany Shale
|
|
| Rockport Formation
|
formation
|
|
|
|
|
|
|
| Rockview Formation
|
formation
|
|
|
|
Rapson Creek Formation
|
Cordell Formation
|
|
| Rockway Formation
|
formation
|
|
|
|
|
|
|
| Rockwell Formation
|
formation
|
|
|
|
Pocono Formation
|
Hampshire Formation
|
|
| Rocky Canyon Granite
|
formation
|
|
|
|
|
|
|
| Rogers City Formation
|
formation
|
|
|
|
Bell Shale
|
Dundee Formation
|
|
| Rome Formation
|
formation
|
|
|
|
Conasauga Formation
|
Mount Simon Sandstone
|
|
| Rome Group
|
group
|
|
|
|
Conasauga Group
|
Tomstown Dolomite
|
|
| Root Glacier Formation
|
formation
|
|
|
|
|
|
|
| Root Shale
|
formation
|
|
|
|
|
|
|
| Rosario Group
|
group
|
|
|
|
|
Mesozoic
|
|
| Rose Hill Formation
|
formation
|
|
|
|
Keefer Sandstone
|
Tuscarora Formation
|
|
| Rosebud Beds
|
formation
|
|
|
|
|
|
|
| Rosebud Formation
|
formation
|
|
|
|
|
|
|
| Roseburg Formation
|
formation
|
|
|
|
|
|
|
| Roslyn Formation
|
formation
|
|
|
|
|
|
|
| Ross Mine Formation
|
formation
|
|
|
|
|
|
|
| Rotunda Room
|
formation
|
|
|
|
|
|
|
| Roubidoux Formation
|
formation
|
|
|
|
Jefferson City Formation
|
Gasconade Formation
|
|
| Rough Rock Sandstone
|
formation
|
|
|
|
|
|
|
| Round Mountain Silt
|
formation
|
|
|
|
|
|
|
| Round Valley Formation
|
formation
|
|
|
|
|
|
|
| Rove Formation
|
formation
|
|
|
|
|
|
|
| Rowe Formation
|
formation
|
|
|
|
Drywood Formation
|
|
|
| Roxbury Conglomerate
|
formation
|
|
|
|
|
|
|
| Roxton Formation
|
formation
|
|
|
|
|
|
|
| Rubio Peak Formation
|
formation
|
|
|
|
|
|
|
| Ruby River Basin Group
|
formation
|
|
|
|
|
|
|
| Ruby Star Granodiorite
|
formation
|
|
|
|
|
|
|
| Runningwater Formation
|
formation
|
|
|
|
|
|
|
| Rushford Formation
|
formation
|
|
|
|
|
|
|
| Rushville Shale
|
formation
|
|
|
|
Maxville Limestone
|
Logan Formation
|
|
| Rust Formation
|
formation
|
|
Late Ordovician
|
Late Ordovician
|
|
|
|
| Rustler Formation
|
formation
|
|
|
|
|
|
|
| Río Culebrinas Formation
|
formation
|
|
|
|
|
|
|
| Río Descalabrado Formation
|
formation
|
|
|
|
|
|
|
| S Bar S Formation
|
formation
|
|
|
|
|
|
|
| S. Oklahoma Ardmore Basin Group
|
formation
|
|
|
|
|
|
|
| Saanich Formation
|
formation
|
|
|
|
|
|
|
| Sabana Grande Formation
|
formation
|
|
|
|
|
|
|
| Sabinetown Bluff Formation
|
formation
|
|
|
|
|
|
|
| Sachuest Arkose
|
formation
|
|
|
|
|
|
|
| Saddle Mountains Basalt
|
formation
|
|
|
|
|
|
|
| Sadler Ranch Formation
|
formation
|
|
|
|
Oxyoke Canyon Formation
|
Bartine Member
|
|
| Sadlerochit Formation
|
formation
|
|
|
|
|
|
|
| Sadlerochit Group
|
formation
|
|
|
|
|
|
|
| Sagavanirktok Formation
|
formation
|
|
|
|
|
|
|
| Sage Creek Formation
|
formation
|
|
|
|
|
|
|
| Sage Junction Formation
|
formation
|
|
|
|
|
|
|
| Saginaw Formation
|
formation
|
|
|
|
Grand River Formation
|
Parma Sandstone
|
|
| Sailor Canyon Formation
|
formation
|
|
|
|
|
|
|
| Salado Formation
|
formation
|
|
|
|
|
|
|
| Salamonie Dolomite
|
formation
|
|
|
|
Pleasant Mills Formation
|
Brassfield Formation
|
|
| Salem Formation
|
formation
|
|
|
|
St. Louis Limestone
|
Harrodsburg Limestone
Warsaw Formation
|
|
| Salem Limestone
|
formation
|
|
|
|
St. Louis Limestone
|
Harrodsburg Limestone
|
|
| Salero Formation
|
formation
|
|
|
|
|
Fort Crittenden Formation
|
|
| Salesville Formation
|
formation
|
|
|
|
|
|
|
| Salina Formation
|
formation
|
|
|
|
Bass Islands Group
|
Lockport Dolomite
|
|
| Salina Group
|
formation
|
|
|
|
|
|
|
| Saline Valley Formation
|
formation
|
|
|
|
|
|
|
| Salitral Formation
|
formation
|
|
|
|
|
|
|
| Salmon City Formation
|
formation
|
|
|
|
|
|
|
| Salmontrout Limestone
|
formation
|
|
|
|
|
|
|
| Salt Lake Formation
|
formation
|
|
|
|
|
|
|
| Salt Mountain Limestone
|
formation
|
|
|
|
|
|
|
| Saluda Formation
|
formation
|
|
|
|
Whitewater Formation
|
Liberty Formation
|
|
| Salyer Formation
|
formation
|
|
|
|
|
|
|
| Sample Formation
|
formation
|
|
|
|
Reelsville Limestone
|
Beaver Bend Limestone
|
|
| San Andres Formation
|
formation
|
|
|
|
|
|
|
| San Angelo Formation
|
formation
|
|
|
|
|
|
|
| San Angelo Group
|
formation
|
|
|
|
|
|
|
| San Antonio Formation
|
formation
|
|
|
|
|
|
|
| San Benito Gravels
|
formation
|
|
|
|
|
|
|
| San Carlos Formation
|
formation
|
|
|
|
|
|
|
| San Diego Formation
|
formation
|
|
|
|
|
|
|
| San Emigdio Formation
|
formation
|
|
|
|
|
|
|
| San Francisquito Formation
|
formation
|
|
|
|
|
|
|
| San Joaquin Formation
|
formation
|
|
|
|
Tulare Formation
|
Etchegoin Formation
|
|
| San Jose Formation
|
formation
|
|
|
|
|
|
|
| San Lorenzo Formation
|
formation
|
|
|
|
|
|
|
| San Margarita Sandstone
|
formation
|
|
|
|
|
|
|
| San Mateo Formation
|
formation
|
|
|
|
|
|
|
| San Pablo Formation
|
formation
|
|
|
|
Pinole Tuff
|
|
|
| San Pedro Arroyo Formation
|
formation
|
|
|
|
|
|
|
| San Pedro Formation
|
formation
|
|
|
|
|
|
|
| San Pedro Sand
|
formation
|
|
|
|
|
|
|
| San Rafael Group
|
group
|
|
|
|
|
|
|
| San Sebastián Limestone
|
formation
|
|
|
|
|
|
|
| San Timoteo Formation
|
formation
|
|
|
|
|
|
|
| Sand Butte Bed
|
bed
|
|
|
|
|
|
|
| Sand Canyon Formation
|
formation
|
|
|
|
|
|
|
| Sand Wells Formation
|
formation
|
|
|
|
|
|
|
| Sanders Group
|
group
|
|
|
|
|
|
|
| Sanderson Formation
|
formation
|
|
|
|
|
|
|
| Sandia Formation
|
formation
|
|
|
|
Madera Formation
|
Osha Canyon Formation
|
|
| Sands Granite
|
formation
|
|
|
|
|
|
|
| Sandsuck Formation
|
formation
|
|
|
|
|
|
|
| Sandy Hook Formation
|
formation
|
|
|
|
Navesink Formation
|
Mount Laurel Formation
|
|
| Sandy Springs Group
|
group
|
|
|
|
|
|
|
| Sangre de Cristo Formation
|
formation
|
|
|
|
|
|
|
| Santa Clara Formation
|
formation
|
|
|
|
|
|
|
| Santa Cruz Mudstone
|
formation
|
|
|
|
Purisima Formation
|
|
|
| Santa Fe Formation
|
formation
|
|
|
|
|
|
|
| Santa Fe Group
|
group
|
|
|
|
|
|
|
| Santa Margarita Formation
|
formation
|
|
|
|
Chanac Formation
|
|
|
| Santa Rosa Flat Formation
|
formation
|
|
|
|
|
|
|
| Santa Rosa Formation
|
formation
|
|
|
|
|
|
|
| Santa Rosa Island Formation
|
formation
|
|
|
|
|
|
|
| Santa Rosa Sandstone
|
formation
|
|
|
|
|
|
|
| Santa Susana Formation
|
formation
|
|
|
|
Meganos Formation
|
Martinez Formation
|
|
| Santee Limestone
|
formation
|
|
|
|
|
|
|
| Santiago Formation
|
formation
|
|
|
|
|
|
|
| Sappa Formation
|
formation
|
|
|
|
|
|
|
| Sappington Formation
|
formation
|
|
|
|
|
|
|
| Saratoga Chalk
|
formation
|
|
|
|
Nacatoch Formation
|
Marlbrook Marl
|
|
| Satanka Formation
|
formation
|
|
|
|
|
|
|
| Satilla Formation
|
formation
|
|
|
|
|
|
|
| Saturday Mountain Formation
|
formation
|
|
|
|
|
|
|
| Saugus Formation
|
formation
|
|
|
|
|
|
|
| Sauquoit Formation
|
formation
|
|
|
|
|
|
|
| Sausbee Formation
|
formation
|
|
|
|
|
|
|
| Savanna Sandstone
|
formation
|
|
|
|
Boggy Formation
|
McAlester Formation
|
|
| Sawatch Formation
|
formation
|
|
|
|
|
|
|
| Scales Shale
|
formation
|
|
|
|
Fort Atkinson Limestone
|
Trenton Limestone
|
|
| Scenic Drive Formation
|
formation
|
|
|
|
|
|
|
| Schaghticoke Formation
|
formation
|
|
|
|
|
|
|
| Scherr Formation
|
formation
|
|
|
|
Foreknobs Formation
|
Brallier Formation
|
|
| Schodack Formation
|
formation
|
|
|
|
|
|
|
| Schoharie Grit
|
formation
|
|
|
|
|
|
|
| Schoolcraft Formation
|
formation
|
|
|
|
Cordell Formation
|
Hendricks Formation
|
|
| Schoonover Formation
|
formation
|
|
|
|
|
|
|
| Schrader Bluff Formation
|
formation
|
|
|
|
Prince Creek Formation
|
Tuluvak Formation
|
|
| Schroyer Formation
|
formation
|
|
|
|
|
|
|
| Schultze Granite
|
formation
|
|
|
|
|
|
|
| Scotch Grove Formation
|
formation
|
|
|
|
Gower Formation
|
Hopkinton Dolomite
|
|
| Scott Canyon Formation
|
formation
|
|
|
|
|
|
|
| Scotts Mills Formation
|
formation
|
|
|
|
|
|
|
| Scranton Formation
|
formation
|
|
|
|
|
|
|
| Scripps Formation
|
formation
|
|
|
|
Friars Formation
|
|
|
| Seabee Formation
|
formation
|
|
|
|
Tuluvak Formation
|
|
|
| Seboomook Group
|
group
|
|
|
|
|
|
|
| Second Value Dolomite
|
formation
|
|
|
|
|
|
|
| Secret Canyon Formation
|
formation
|
|
|
|
|
|
|
| Sedan Formation
|
formation
|
|
|
|
|
|
|
| Sedwick Formation
|
formation
|
|
|
|
|
|
|
| Sego Sandstone
|
formation
|
|
|
|
|
|
|
| Segovia Formation
|
formation
|
|
|
|
|
|
|
| Seguin Formation
|
formation
|
|
|
|
|
|
|
| Sehoo Formation
|
formation
|
|
|
|
|
|
|
| Selby Limestone
|
formation
|
|
|
|
|
|
|
| Selma Group
|
formation
|
|
|
|
Midway Group
|
Eutaw Formation
|
|
| Selman Formation
|
formation
|
|
|
|
|
|
|
| Seminole Formation
|
formation
|
|
|
|
|
|
|
| Sentinel Butte Formation
|
formation
|
|
|
|
Golden Valley Formation
|
Bullion Creek Formation
|
|
| Sepulcher Formation
|
formation
|
|
|
|
|
|
|
| Sequatchie Formation
|
formation
|
|
|
|
|
|
|
| Sespe Formation
|
formation
|
|
|
|
Vaqueros Formation
|
Coldwater Sandstone
|
|
| Setters Formation
|
formation
|
|
|
|
|
|
|
| Seven Devils Group
|
formation
|
|
|
|
|
|
|
| Seven Rivers Formation
|
formation
|
|
|
|
|
|
|
| Severn Formation
|
formation
|
|
|
|
|
|
|
| Severy Shale
|
formation
|
|
|
|
|
|
|
| Sevier Formation
|
formation
|
|
|
|
|
|
|
| Seville Formation
|
formation
|
|
|
|
|
|
|
| Sevy Dolomite
|
formation
|
|
|
|
|
|
|
| Seymour Formation
|
formation
|
|
|
|
|
|
|
| Shady Dolomite
|
formation
|
|
|
|
Rome Formation
|
|
|
| Shafter Formation
|
formation
|
|
|
|
|
|
|
| Shakopee Formation
|
formation
|
|
|
|
Everton Dolomite
|
Oneota Formation
|
|
| Shalem Colony Formation
|
formation
|
|
|
|
|
|
|
| Shark River Formation
|
formation
|
|
|
|
|
Manasquan Formation
|
|
| Shark River Marl
|
formation
|
|
|
|
|
|
|
| Sharon Springs Formation
|
formation
|
|
|
|
|
|
|
| Sharps Formation
|
formation
|
|
|
|
|
|
|
| Shasta Formation
|
formation
|
|
|
|
|
|
|
| Shawangunk Formation
|
formation
|
|
|
|
Bloomsburg Formation
|
Martinsburg Formation
|
|
| Shawnee Group
|
formation
|
|
|
|
|
|
|
| Shedhorn Formation
|
formation
|
|
|
|
|
|
|
| Shedhorn Sandstone
|
formation
|
|
|
|
|
|
|
| Sheep Creek Formation
|
formation
|
|
|
|
|
|
|
| Sheep Pass Formation
|
formation
|
|
|
|
|
|
|
| Sheep Pen Sandstone
|
formation
|
|
|
|
|
|
|
| Sheep Pen Sandstone Formation
|
formation
|
|
|
|
|
|
|
| Sheffield Formation
|
formation
|
|
|
|
|
|
|
| Shelburn Formation
|
formation
|
|
|
|
Patoka Formation
|
Dugger Formation
|
|
| Shelikof Formation
|
formation
|
|
|
|
|
|
|
| Shell Creek Shale
|
formation
|
|
|
|
|
|
|
| Shell Rock Formation
|
formation
|
|
|
|
|
|
|
| Shellenberger Canyon Formation
|
formation
|
|
|
|
|
|
|
| Sherburne Formation
|
formation
|
|
|
|
|
|
|
| Sherburne Sandstone
|
formation
|
|
|
|
|
|
|
| Sherman Fall Limestone
|
formation
|
|
|
|
|
|
|
| Shields Formation
|
formation
|
|
|
|
|
|
|
| Shin Brook Formation
|
formation
|
|
|
|
|
|
|
| Shinarump Conglomerate
|
formation
|
|
|
|
Petrified Forest Member
|
Moenkopi Formation
|
|
| Shingle Creek Quartzite
|
formation
|
|
|
|
|
|
|
| Shingle Mill Limestone
|
formation
|
|
|
|
|
|
|
| Shingle Pass Tuff
|
formation
|
|
|
|
|
|
|
| Shinumo Quartzite
|
formation
|
|
Stenian
|
Stenian
|
Dox Formation
|
Hakatai Shale
|
|
| Shoal River Formation
|
formation
|
|
|
|
|
|
|
| Shooting Iron Formation
|
formation
|
|
|
|
|
|
|
| Shoshone Formation
|
formation
|
|
|
|
|
|
|
| Shublik Formation
|
formation
|
|
|
|
Ogotoruk Formation
|
|
|
| Shuler Formation
|
formation
|
|
|
|
|
|
|
| Shuttle Meadow Formation
|
formation
|
|
|
|
|
|
|
| Siemens Creek Formation
|
formation
|
|
|
|
|
|
|
| Sierra Blanca Limestone
|
formation
|
|
|
|
|
|
|
| Sierra Ladrones Formation
|
formation
|
|
|
|
|
|
|
| Sierrite Formation
|
formation
|
|
|
|
|
|
|
| Siesta Formation
|
formation
|
|
|
|
|
|
|
| Siksikpuk Formation
|
formation
|
|
|
|
|
|
|
| Siksikpuk Formation
|
formation
|
|
|
|
|
|
|
| Silica Formation
|
formation
|
|
|
|
Tenmile Creek Dolomite
|
Dundee Formation
|
|
| Silver Bluff Formation
|
formation
|
|
|
|
|
|
|
| Silver Creek Formation
|
formation
|
|
|
|
|
|
|
| Silverado Formation
|
formation
|
|
|
|
|
|
|
| Silverdale Formation
|
formation
|
|
|
|
|
|
|
| Silverhorn Dolomite
|
formation
|
|
|
|
|
|
|
| Simmler Formation
|
formation
|
|
|
|
|
|
|
| Simonson Dolomite
|
formation
|
|
|
|
|
|
|
| Simpson Group
|
group
|
|
|
|
|
|
|
| Sinbad Formation
|
formation
|
|
|
|
|
|
|
| Singas Formation
|
formation
|
|
|
|
|
|
|
| Sisquoc Formation
|
formation
|
|
|
|
Pico Formation
|
Monterey Formation
|
|
| Sixmile Creek Formation
|
formation
|
|
|
|
|
|
|
| Sixtymile Formation
|
formation
|
|
|
|
Tonto Group
|
Chuar Group
|
|
| Skajit Formation
|
formation
|
|
|
|
|
|
|
| Skeels Corner Slate
|
formation
|
|
|
|
|
|
|
| Skiatook Group
|
formation
|
|
|
|
|
|
|
| Skinner Mountain Formation
|
formation
|
|
|
|
|
|
|
| Skinner Ranch Formation
|
formation
|
|
|
|
|
|
|
| Skooner Gulch Formation
|
formation
|
|
|
|
|
|
|
| Skull Creek Shale
|
formation
|
|
|
|
|
|
|
| Skunnemunk Conglomerate
|
formation
|
|
|
|
|
Bellvale Sandstone
|
|
| Slade Formation
|
formation
|
|
|
|
|
|
|
| Slana Spur Formation
|
formation
|
|
|
|
|
|
|
| Sligo Formation
|
formation
|
|
|
|
|
|
|
| Slim Buttes Formation
|
formation
|
|
|
|
|
|
|
| Slim Sam Formation
|
formation
|
|
|
|
|
|
|
| Sloan Canyon Formation
|
formation
|
|
|
|
|
|
|
| Slope Formation
|
formation
|
|
|
|
Bullion Creek Formation
|
Ludlow Formation
|
|
| Sly Gap Formation
|
formation
|
|
|
|
|
|
|
| Smackover Formation
|
formation
|
|
|
|
|
|
|
| Smeltertown Formation
|
formation
|
|
|
|
|
|
|
| Smithville Formation
|
formation
|
|
|
|
Everton Formation
|
Powell Formation
|
|
| Smithwick Formation
|
formation
|
|
|
|
|
|
|
| Snake Creek Formation
|
formation
|
|
|
|
|
|
|
| Snaky Canyon Formation
|
formation
|
|
|
|
|
|
|
| Snowbird Group
|
group
|
|
|
|
|
|
|
| Snowshoe Formation
|
formation
|
|
|
|
|
|
|
| Snowslip Formation
|
formation
|
|
|
|
|
|
|
| Snowy Range Formation
|
formation
|
|
|
|
|
|
|
| Snyder Creek Shale
|
formation
|
|
|
|
|
|
|
| Snyder Hill Formation
|
formation
|
|
|
|
|
|
|
| Soapstone Formation
|
formation
|
|
|
|
|
|
|
| Socastee Formation
|
formation
|
|
|
|
|
|
|
| Socorro Peak Rhyolite
|
formation
|
|
|
|
|
|
|
| Sod House Tuff
|
formation
|
|
|
|
Frenchie Creek Rhyolite
|
|
|
| Soda Creek Formation
|
formation
|
|
|
|
|
|
|
| Soda Lake Bed
|
formation
|
|
|
|
|
|
|
| Sodus Formation
|
formation
|
|
|
|
|
|
|
| Sodus Shale
|
formation
|
|
|
|
|
|
|
| Solor Church Formation
|
formation
|
|
|
|
|
|
|
| Sonoma Volcanics
|
formation
|
|
|
|
|
|
|
| Sonyea Group
|
formation
|
|
|
|
West Falls Group
|
Genesee Group
|
|
| South Bight Formation
|
formation
|
|
|
|
|
|
|
| South Platte Formation
|
formation
|
|
|
|
|
|
|
| Spearfish Formation
|
formation
|
|
|
|
Sundance Formation
|
|
|
| Spechts Ferry Formation
|
formation
|
|
|
|
|
|
|
| Speeds Formation
|
formation
|
|
|
|
|
|
|
| Speiser Shale
|
formation
|
|
|
|
|
|
|
| Spence Shale
|
formation
|
|
|
|
|
|
|
| Spickert Knob Formation
|
formation
|
|
|
|
Edwardsville Formation
|
New Providence Shale
|
|
| Spieden Formation
|
formation
|
|
|
|
|
|
|
| Spieden Group
|
group
|
|
|
|
|
|
|
| Spillville Formation
|
formation
|
|
|
|
|
|
|
| Split Creek Formation
|
formation
|
|
|
|
|
|
|
| Split Rock Formation
|
formation
|
|
|
|
|
|
|
| Spokane Formation
|
formation
|
|
|
|
|
|
|
| Spoon Formation
|
formation
|
|
|
|
|
|
|
| Spraberry Formation
|
formation
|
|
|
|
|
|
|
| Spragueville Formation
|
formation
|
|
|
|
|
|
|
| Springer Formation
|
formation
|
|
|
|
|
|
|
| Sprinkle Formation
|
formation
|
|
|
|
|
|
|
| St. Albans Shale
|
formation
|
|
|
|
|
|
|
| St. Charles Formation
|
formation
|
|
|
|
|
|
|
| St. Clair Limestone
|
formation
|
|
|
|
Lafferty Limestone
|
Brassfield Formation
|
|
| St. David Formation
|
formation
|
|
|
|
|
|
|
| St. George Formation
|
formation
|
|
|
|
|
|
|
| St. Joe Formation
|
formation
|
|
|
|
|
Chattanooga Shale
|
|
| St. Kevin Granite
|
formation
|
|
|
|
|
|
|
| St. Laurent Formation
|
formation
|
|
|
|
|
|
|
| St. Louis Formation
|
formation
|
|
|
|
|
|
|
| St. Louis Limestone
|
formation
|
|
|
|
Ste. Genevieve Limestone
|
Salem Formation
|
|
| St. Marks Formation
|
formation
|
|
|
|
|
|
|
| St. Mary River Formation
|
formation
|
|
|
|
Willow Creek Formation
|
Bearpaw Shale
|
|
| St. Marys Formation
|
formation
|
|
|
|
|
|
|
| St. Maurice Formation
|
formation
|
|
|
|
|
|
|
| St. Paul Group
|
group
|
|
|
|
Black River Group
|
Beekmantown Dolomite
|
|
| St. Peter Sandstone
|
formation
|
|
|
|
Dutchtown Formation
Joachim Dolomite
|
Beekmantown Dolomite
|
|
| St. Regis Formation
|
formation
|
|
|
|
|
|
|
| Stadium Conglomerate
|
formation
|
|
|
|
Mission Valley Formation
|
Friars Formation
|
|
| Stanislaus Group
|
group
|
|
|
|
|
|
|
| Staniukovich Formation
|
formation
|
|
|
|
|
|
|
| Stanley Group
|
group
|
|
|
|
|
|
|
| Stanley Shale
|
formation
|
|
|
|
Jackfork Sandstone
|
|
|
| Stanton Formation
|
formation
|
|
|
|
Weston Shale
|
Vilas Shale
|
|
| Star Peak Group
|
group
|
|
|
|
|
|
|
| Star Point Sandstone
|
formation
|
|
|
|
|
|
|
| Starlight Formation
|
formation
|
|
|
|
|
|
|
| Statenville Formation
|
formation
|
|
|
|
|
Coosawhatchie Formation
|
|
| Staunton Formation
|
formation
|
|
|
|
Linton Formation
|
Brazil Formation
|
|
| Ste. Genevieve Formation
|
formation
|
|
|
|
|
|
|
| Ste. Genevieve Limestone
|
formation
|
|
|
|
Girkin Formation
|
St. Louis Limestone
|
|
| Stella Lake Quartzite
|
formation
|
|
|
|
|
|
|
| Stephensport Group
|
group
|
|
|
|
|
|
|
| Stepovak Formation
|
formation
|
|
|
|
|
|
|
| Stewartville Formation
|
formation
|
|
|
|
|
|
|
| Stingy Creek Formation
|
formation
|
|
|
|
|
|
|
| Stirling Quartzite Formation
|
formation
|
|
|
|
Wood Canyon Formation
|
Johnnie Formation
|
|
| Stockbridge Formation
|
formation
|
|
|
|
|
|
|
| Stockton Formation
|
formation
|
|
|
|
Lockatong Formation
|
|
|
| Stone City Formation
|
formation
|
|
|
|
|
|
|
| Stonehenge Formation
|
formation
|
|
|
|
|
|
|
| Stonehenge Limestone
|
formation
|
|
|
|
Nittany Dolomite
|
|
|
| Stones River Group
|
group
|
|
|
|
Hermitage Formation
|
Knox Dolomite
|
|
| Stonewall Flat Tuff
|
formation
|
|
|
|
|
|
|
| Stonington Formation
|
formation
|
|
|
|
Big Hill Formation
|
Bill's Creek Shale
|
|
| Stony Creek Formation
|
formation
|
|
|
|
|
|
|
| Stotler Formation
|
formation
|
|
|
|
|
|
|
| Stotler Limestone
|
formation
|
|
|
|
|
|
|
| Straight Cliffs Formation
|
formation
|
|
|
|
Wahweap Formation
|
Tropic Shale Formation
|
|
| Stranger Formation
|
formation
|
|
|
|
|
|
|
| Stratford Formation
|
formation
|
|
|
|
|
|
|
| Strathearn Formation
|
formation
|
|
|
|
|
|
|
| Strawberry Creek Formation
|
formation
|
|
|
|
|
|
|
| Strawn Formation
|
formation
|
|
|
|
|
|
|
| Strawn Group
|
formation
|
|
|
|
|
|
|
| Stuart City Formation
|
formation
|
|
|
|
Del Rio Formation
|
Glen Rose Formation
|
|
| Stump Formation
|
formation
|
|
|
|
|
|
|
| Sturgis Formation
|
formation
|
|
|
|
|
|
|
| Sucker Creek Formation
|
formation
|
|
|
|
|
|
|
| Sullivan Peak Formation
|
formation
|
|
|
|
|
|
|
| Sultan Formation
|
formation
|
|
|
|
|
|
|
| Sultan Limestone
|
formation
|
|
|
|
|
|
|
| Summerville Formation
|
formation
|
|
|
|
|
|
|
| Summit Granite
|
formation
|
|
|
|
|
|
|
| Sun Valley Group
|
group
|
|
|
|
|
|
|
| Sunbury Shale
|
formation
|
|
|
|
Coldwater Shale
|
Berea Sandstone
|
|
| Sunflower Formation
|
formation
|
|
|
|
|
|
|
| Sunlight Group
|
group
|
|
|
|
|
|
|
| Sunrise Formation
|
formation
|
|
|
|
|
|
|
| Sunset Formation
|
formation
|
|
|
|
|
|
|
| Supai Formation
|
formation
|
|
|
|
|
|
|
| Supai Group
|
group
|
|
|
|
Hermit Formation
|
Redwall Limestone
|
|
| Suplee Formation
|
formation
|
|
|
|
|
|
|
| Surprise Canyon Formation
|
formation
|
|
|
|
Watahomigi Formation
|
Redwall Limestone
|
|
| Surrett Canyon Formation
|
formation
|
|
|
|
|
|
|
| Swan Peak Formation
|
formation
|
|
|
|
|
|
|
| Swarbrick Formation
|
formation
|
|
|
|
|
|
|
| Swasey Formation
|
formation
|
|
|
|
|
|
|
| Swasey Limestone
|
formation
|
|
|
|
|
|
|
| Sweetwater Formation
|
formation
|
|
|
|
|
|
|
| Swift Run Formation
|
formation
|
|
|
|
Catoctin Formation
|
|
|
| Swope Limestone
|
formation
|
|
|
|
|
|
|
| Sykes Mountain Formation
|
formation
|
|
|
|
|
|
|
| Sylvania Sandstone
|
formation
|
|
|
|
Amherstburg Formation
|
Bois Blanc Formation
|
|
| Syracuse Formation
|
formation
|
|
|
|
|
|
|
| Tachilni Formation
|
formation
|
|
|
|
|
|
|
| Tacket Formation
|
formation
|
|
|
|
|
|
|
| Takhandit Formation
|
formation
|
|
|
|
|
|
|
| Talbot Formation
|
formation
|
|
|
|
|
|
|
| Talkeetna Formation
|
formation
|
|
|
|
|
|
|
| Tallahatta Formation
|
formation
|
|
|
|
Winona Formation
|
|
|
| Talpa Formation
|
formation
|
|
|
|
|
|
|
| Tamiami Formation
|
formation
|
|
|
|
|
Hawthorn Group
|
|
| Tanners Creek Formation
|
formation
|
|
|
|
|
|
|
| Tanos Formation
|
formation
|
|
|
|
|
|
|
| Tansill Formation
|
formation
|
|
|
|
|
|
|
| Tanyard Formation
|
formation
|
|
|
|
|
|
|
| Tapeats Sandstone
|
formation
|
|
|
|
Bright Angel Shale
|
Nankoweap Formation
Great Unconformity
|
|
| Tar Heel Formation
|
formation
|
|
|
|
|
|
|
| Tar Springs Formation
|
formation
|
|
|
|
Branchville Formation
|
Glen Dean Limestone
|
|
| Tarkio Formation
|
formation
|
|
|
|
|
|
|
| Tarrant Formation
|
formation
|
|
|
|
|
|
|
| Tarratine Formation
|
formation
|
|
|
|
|
|
|
| Tate Formation
|
formation
|
|
|
|
|
|
|
| Tatman Formation
|
formation
|
|
|
|
|
|
|
| Taylor Creek Rhyolite
|
formation
|
|
|
|
|
|
|
| Taylor Group
|
formation
|
|
|
|
|
|
|
| Taylor Marl
|
formation
|
|
|
|
|
|
|
| Tea Cup Granodiorite
|
formation
|
|
|
|
|
|
|
| Tecopa Lake Beds
|
formation
|
|
|
|
|
|
|
| Tecovas Formation
|
formation
|
|
|
|
Trujillo Formation
|
|
|
| Tecuya Formation
|
formation
|
|
|
|
|
|
|
| Teewinot Formation
|
formation
|
|
|
|
|
|
|
| Tejon Formation
|
formation
|
|
|
|
|
Martinez Formation
|
|
| Telavirak Formation
|
formation
|
|
|
|
Kisimilok Formation
|
|
|
| Telegraph Canyon Formation
|
formation
|
|
|
|
|
|
|
| Telegraph Creek Formation
|
formation
|
|
|
|
|
|
|
| Telsitna Formation
|
formation
|
|
|
|
|
|
|
| Temblor Formation
|
formation
|
|
|
|
Monterey Formation
|
Kreyenhagen Shale
|
|
| Temecula Arkose
|
formation
|
|
|
|
|
|
|
| Temple Butte Limestone
|
formation
|
|
|
|
Redwall Limestone
|
Muav Limestone
Tonto Group
|
|
| Temple Cap Formation
|
formation
|
|
|
|
|
|
|
| Ten Mile Hill Beds
|
formation
|
|
|
|
|
|
|
| Tenmile Creek Formation
|
formation
|
|
|
|
|
|
|
| Tenmile Formation
|
formation
|
|
|
|
|
|
|
| Tensleep Sandstone
|
formation
|
|
|
|
Phosphoria Formation
|
|
|
| Tepee Trail Formation
|
formation
|
|
|
|
|
|
|
| Tererro Formation
|
formation
|
|
|
|
|
|
|
| Tesnus Formation
|
formation
|
|
|
|
Dimple Limestone
|
|
|
| Tesuque Formation
|
formation
|
|
|
|
Ancha Formation
|
|
|
| Tetelna Formation
|
formation
|
|
|
|
|
|
|
| Teutonia Quartz Monzonite
|
formation
|
|
|
|
|
|
|
| Thaynes Formation
|
formation
|
|
|
|
|
|
|
| Thaynes Group
|
formation
|
|
|
|
|
|
|
| Thaynes Limestone
|
formation
|
|
|
|
|
|
|
| Theodosia Formation
|
formation
|
|
|
|
|
|
|
| Thermopolis Shale
|
formation
|
|
|
|
Mowry Shale
|
Kootenai Formation
|
|
| Thimble Limestone
|
formation
|
|
|
|
Echo Shale
|
Eagle Mountain Shale Member
|
|
| Thin Elk Formation
|
formation
|
|
|
|
|
|
|
| Thirsty Canyon Group
|
group
|
|
|
|
|
|
|
| Thomas Fork Formation
|
formation
|
|
|
|
|
|
|
| Thompson Formation
|
formation
|
|
|
|
|
|
|
| Thomson Formation
|
formation
|
|
|
|
|
|
|
| Thorofare Creek Group
|
group
|
|
|
|
|
|
|
| Thorold Formation
|
formation
|
|
|
|
|
|
|
| Thorold Sandstone
|
formation
|
|
|
|
Cambria Shale
Neagha Shale
Clinton Formation
|
Grimsby Formation
|
|
| Three Forks Shale
|
formation
|
|
|
|
|
|
|
| Threemile Formation
|
formation
|
|
|
|
|
|
|
| Thrifty Formation
|
formation
|
|
|
|
|
|
|
| Throughgood Formation
|
formation
|
|
|
|
|
|
|
| Thunder Bay Limestone
|
formation
|
|
|
|
Kettle Point Shale
|
Alpena Formation
|
|
| Tibbstown Formation
|
formation
|
|
|
|
|
Balls Bluff Siltstone
|
|
| Tick Canyon Formation
|
formation
|
|
|
|
Mint Canyon Formation
|
|
|
| Tiger Leap Formation
|
formation
|
|
|
|
|
|
|
| Tiglukpuk Formation
|
formation
|
|
|
|
|
|
|
| Timber Mountain Group
|
group
|
|
|
|
|
|
|
| Timm's Point Formation
|
formation
|
|
|
|
|
|
|
| Timothy Sandstone
|
formation
|
|
|
|
|
|
|
| Tinton Formation
|
formation
|
|
|
|
Hornerstown Formation
|
|
|
| Titus Canyon Formation
|
formation
|
|
|
|
|
|
|
| Titusville Till
|
formation
till
|
|
|
|
|
|
|
| Tiva Canyon Tuff
|
formation
|
|
|
|
|
Yucca Mountain Tuff
|
|
| Tobacco Road Formation
|
formation
|
|
|
|
|
|
|
| Tobin Formation
|
formation
|
|
|
|
|
|
|
| Tobinsport Formation
|
formation
|
|
|
|
Grove Church Shale
|
Branchville Formation
|
|
| Todilto Formation
|
formation
|
|
|
|
|
|
|
| Tohachi Formation
|
formation
|
|
|
|
|
|
|
| Tokio Formation
|
formation
|
|
|
|
Brownstone Marl
|
Woodbine Formation
|
|
| Tolovana Formation
|
formation
|
|
|
|
|
|
|
| Tolstoi Formation
|
formation
|
|
|
|
|
|
|
| Tomhegan Formation
|
formation
|
|
|
|
|
|
|
| Tomstown Dolomite
|
formation
|
|
|
|
Waynesboro Formation
|
Antietam Formation
Chilhowee Group
|
|
| Tonoloway Formation
|
formation
|
|
|
|
Keyser Formation
|
Wills Creek Formation
|
|
| Tonto Group
|
group
|
|
|
|
Temple Butte Limestone
|
Vishnu Basement Rocks
|
|
| Topanga Canyon Formation
|
formation
|
|
|
|
Modelo Formation
|
|
|
| Topeka Formation
|
formation
|
|
|
|
|
|
|
| Topopah Spring Tuff
|
formation
|
|
|
|
|
|
|
| Topsy Formation
|
formation
|
|
|
|
|
|
|
| Tor Limestone
|
formation
|
|
|
|
|
|
|
| Torcer Formation
|
formation
|
|
|
|
|
|
|
| Toreva Formation
|
formation
|
|
|
|
|
|
|
| Tornillo Group
|
formation
|
|
|
|
|
|
|
| Torok Formation
|
formation
|
|
|
|
|
|
|
| Toroweap Formation
|
formation
|
|
|
|
Kaibab Limestone
|
Coconino Sandstone
|
|
| Torreya Formation
|
formation
|
|
|
|
St. Marks Formation
|
|
|
| Toston Formation
|
formation
|
|
|
|
|
|
|
| Touchet Formation
|
formation
|
|
|
|
loess
|
Columbia River Basalt Group
|
|
| Towaco Formation
|
formation
|
|
|
|
|
|
|
| Towle Shale
|
formation
|
|
|
|
|
|
|
| Townsend Shale
|
formation
|
|
|
|
|
|
|
| Towsley Formation
|
formation
|
|
|
|
|
|
|
| Tradewater Formation
|
formation
|
|
|
|
|
|
|
| Trail Canyon Formation
|
formation
|
|
|
|
|
|
|
| Trail Canyon Limestone
|
formation
|
|
|
|
|
|
|
| Trail Creek Formation
|
formation
|
|
|
|
|
|
|
| Trail Ridge Tuff
|
formation
|
|
|
|
Gold Flat Tuff
|
Pahute Mesa Tuff
|
|
| Tram Tuff
|
formation
|
|
|
|
Bullfrog Tuff
|
|
|
| Traverse Formation
|
formation
|
|
|
|
Antrim Shale
|
Detroit River Group
|
|
| Travesser Formation
|
formation
|
|
|
|
|
|
|
| Travis Peak Formation
|
formation
|
|
|
|
|
|
|
| Treasure Mountain Group
|
group
|
|
|
|
|
|
|
| Treasure Mountain Tuff
|
formation
|
|
|
|
|
|
|
| Trempealeau Formation
|
formation
|
|
|
|
|
Munising Formation
|
|
| Trent Formation
|
formation
|
|
|
|
|
|
|
| Trenton Group
|
formation
|
|
|
|
Cincinnati Group
|
Black River Group
|
|
| Trenton Limestone
|
formation
|
|
|
|
Collingwood Shale
Point Pleasant Formation
Scales Shale
|
Black River Formation
|
|
| Tres Hermanos Formation
|
formation
|
|
|
|
|
|
|
| Triangle Formation
|
formation
|
|
|
|
|
|
|
| Tribes Hill Formation
|
formation
|
|
|
|
|
|
|
| Trinity Formation
|
formation
|
|
|
|
|
|
|
| Trinity Group
|
formation
|
|
|
|
|
|
|
| Tropic Shale Formation
|
formation
|
|
|
|
Straight Cliffs Formation
|
Dakota Formation
|
|
| Tropico Group
|
lithostratigraphic unit
group
|
|
|
|
|
|
|
| Troublesome Formation
|
formation
|
|
|
|
|
|
|
| Trout Peak Trachyandesite
|
formation
|
|
|
|
|
|
|
| Trout Valley Formation
|
formation
|
|
|
|
|
|
|
| Troy Quartzite
|
formation
|
|
|
|
|
|
|
| Truckee Formation
|
formation
|
|
|
|
|
|
|
| Trujillo Formation
|
formation
|
|
|
|
|
|
|
| Tsegi Alluvium
|
formation
|
|
|
|
|
|
|
| Tucumcari Formation
|
formation
|
|
|
|
|
|
|
| Tulare Formation
|
formation
|
|
|
|
|
San Joaquin Formation
|
|
| Tule Formation
|
formation
|
|
|
|
|
|
|
| Tule Mountain Trachyandesite
|
formation
|
|
|
|
|
|
|
| Tule Spring Limestone
|
formation
|
|
|
|
|
|
|
| Tulip Creek Formation
|
formation
|
|
|
|
|
|
|
| Tullock Formation
|
formation
|
|
|
|
|
|
|
| Tuluvak Formation
|
formation
|
|
|
|
Schrader Bluff Formation
|
Seabee Formation
|
|
| Tumey Formation
|
formation
|
|
|
|
|
|
|
| Tuna Canyon Formation
|
formation
|
|
|
|
|
|
|
| Tupelo Bay Formation
|
formation
|
|
|
|
|
|
|
| Turkey Branch Formation
|
formation
|
|
|
|
|
|
|
| Turlock Lake Formation
|
formation
|
|
|
|
Riverbank Formation
|
Mehrten Formation
|
|
| Turners Falls Formation
|
formation
|
|
|
|
|
|
|
| Turney Ranch Formation
|
formation
|
|
|
|
|
|
|
| Turtle Butte Formation
|
formation
|
|
|
|
|
|
|
| Turupah Formation
|
formation
|
|
|
|
|
|
|
| Tuscahoma Formation
|
formation
|
|
|
|
|
|
|
| Tuscahoma Sand
|
formation
|
|
|
|
|
|
|
| Tuscaloosa Formation
|
formation
|
|
|
|
Eutaw Formation
|
|
|
| Tuscan Formation
|
formation
|
|
|
|
|
|
|
| Tuscarora Formation
|
formation
|
|
|
|
Clinton Group
|
Juniata Formation
|
|
| Tuscher Formation
|
formation
|
|
|
|
|
|
|
| Tuxedni Formation
|
formation
|
|
|
|
|
|
|
| Tuxedni Group
|
group
|
|
|
|
|
|
|
| Twentymile Sandstone
|
formation
|
|
|
|
|
|
|
| Twiggs Clay
|
formation
|
|
|
|
|
|
|
| Twin Creek Formation
|
formation
|
|
|
|
|
|
|
| Twin Creek Limestone
|
formation
|
|
|
|
|
|
|
| Twin Mountains Formation
|
formation
|
|
|
|
Glen Rose Formation
|
Petrolia Formation
|
|
| Twin River Group
|
group
|
|
|
|
|
|
|
| Twin Rivers Formation
|
formation
|
|
|
|
|
|
|
| Twist Creek Siltstone
|
formation
|
|
|
|
|
|
|
| Two Medicine Formation
|
formation
|
|
|
|
Bearpaw Shale
|
Virgelle Sandstone
|
|
| Two Ocean Formation
|
formation
|
|
|
|
|
|
|
| Tybo Shale
|
formation
|
|
|
|
|
|
|
| Tyee Formation
|
formation
|
|
|
|
|
|
|
| Tyee Sandstone
|
formation
|
|
|
|
|
|
|
| Tymochtee Formation
|
formation
|
|
|
|
Hillsboro Sandstone
|
Greenfield Dolomite
|
|
| Tyonek Formation
|
formation
|
|
|
|
|
|
|
| Tyrone Limestone
|
formation
|
|
|
|
Lexington Limestone
|
Oregon Formation
|
|
| Uinta Formation
|
formation
|
|
|
|
|
|
|
| Uinta Mountain Group
|
group
|
|
|
|
|
|
|
| Ulungarat Formation
|
formation
|
|
|
|
|
|
|
| Umpqua Group
|
formation
|
|
|
|
|
|
|
| Unalaska Formation
|
formation
|
|
|
|
|
Aleutian Ridge
|
|
| Ungalikthluk Belt Formation
|
formation
|
|
|
|
|
|
|
| Union Springs Formation
|
formation
|
|
|
|
|
|
|
| Union Wash Formation
|
formation
|
|
|
|
|
|
|
| Unkar Group
|
group
|
|
|
|
Nankoweap Formation
|
Vishnu Basement Rocks
|
|
| Upsal Hogback Bed
|
formation
|
|
|
|
|
|
|
| Ute Formation
|
formation
|
|
|
|
|
|
|
| Ute Limestone
|
formation
|
|
|
|
|
|
|
| Utica Shale
|
formation
|
|
|
|
|
Trenton Group
|
|
| Valcour Formation
|
formation
|
|
|
|
|
|
|
| Valdez Group
|
group
|
|
|
|
|
|
|
| Vale Formation
|
formation
|
|
|
|
|
|
|
| Valentine Formation
|
formation
|
|
|
|
|
|
|
| Valera Shale
|
formation
|
|
|
|
|
|
|
| Vallejo Formation
|
formation
|
|
|
|
|
|
|
| Valmonte Diatomite
|
formation
|
|
|
|
|
|
|
| Valmy Formation
|
formation
|
|
|
|
|
|
|
| Valmy Group
|
formation
|
|
|
|
|
|
|
| Vandever Shale
|
formation
|
|
|
|
|
|
|
| Vanheim Formation
|
formation
|
|
|
|
|
|
|
| Vanoss Formation
|
formation
|
|
|
|
|
|
|
| Vaquero Formation
|
formation
|
|
|
|
|
|
|
| Vaqueros Formation
|
formation
|
|
|
|
Rincon Formation
Monterey Formation
|
Sespe Formation
|
|
| Vassalboro Formation
|
formation
|
|
|
|
|
|
|
| Vedder Sand
|
formation
|
|
|
|
|
|
|
| Venango Formation
|
formation
|
|
|
|
|
|
|
| Verdigris Formation
|
formation
|
|
|
|
|
|
|
| Vermejo Formation
|
formation
|
|
|
|
|
|
|
| Vernon Formation
|
formation
|
|
|
|
|
|
|
| Vernon Shale
|
formation
|
|
|
|
|
|
|
| Vester Formation
|
formation
|
|
|
|
|
|
|
| Vicksburg Group
|
formation
|
|
|
|
|
|
|
| Victorio Formation
|
formation
|
|
|
|
|
|
|
| Vidrio Formation
|
formation
|
|
|
|
|
|
|
| Vieja Formation
|
formation
|
|
|
|
|
|
|
| Vilas Shale
|
formation
|
|
|
|
|
|
|
| Vincentown Formation
|
formation
|
|
|
|
|
Hornerstown Formation
|
|
| Vinini Formation
|
formation
|
|
|
|
|
|
|
| Viola Formation
|
formation
|
|
|
|
|
|
|
| Virgelle Sandstone
|
formation
|
|
|
|
Two Medicine Formation
|
|
|
| Virgilina Formation
|
formation
|
|
|
|
|
Aaron Formation
|
|
| Virgin Formation
|
formation
|
|
|
|
|
|
|
| Virgin Limestone Member
|
member
formation
|
|
|
|
|
|
|
| Virgin Valley Formation
|
formation
|
|
|
|
|
|
|
| Virginian Ridge Formation
|
formation
|
|
|
|
|
|
|
| Vishnu Basement Rocks
|
formation
|
|
|
|
Unkar Group
|
|
|
| Wabash Formation
|
formation
|
|
|
|
Backbone Limestone
|
Louisville Limestone
|
|
| Wabaunsee Formation
|
formation
|
|
|
|
|
|
|
| Wabaunsee Group
|
formation
|
|
|
|
|
|
|
| Waccamaw Formation
|
formation
|
|
|
|
|
|
|
| Wachsmuth Formation
|
formation
|
|
|
|
|
|
|
| Wadleigh Limestone
|
formation
|
|
|
|
|
|
|
| Waggoner Ranch Formation
|
formation
|
|
|
|
|
|
|
| Wagon Bed Formation
|
formation
|
|
|
|
|
|
|
| Wah Wah Springs Formation
|
formation
|
|
|
|
|
|
|
| Wahmonie Formation
|
formation
|
|
|
|
|
|
|
| Wahwah Limestone
|
formation
|
|
|
|
|
|
|
| Wahweap Formation
|
formation
|
|
|
|
|
|
|
| Waimanalo Formation
|
formation
|
|
|
|
|
|
|
| Waits River Formation
|
formation
|
|
|
|
|
|
|
| Wakarusa Formation
|
formation
|
|
|
|
|
|
|
| Walden Creek Group
|
group
|
|
|
|
|
|
|
| Walden Sandstone
|
formation
|
|
|
|
|
|
|
| Waldrip Formation
|
formation
|
|
|
|
|
|
|
| Waldron Shale
|
formation
|
|
|
|
|
Laurel Limestone
|
|
| Wall Mountain Tuff
|
formation
|
|
|
|
|
|
|
| Wallsburg Ridge Formation
|
formation
|
|
|
|
|
|
|
| Walnut Clay
|
formation
|
|
|
|
|
|
|
| Walnut Formation
|
formation
|
|
|
|
|
|
|
| Waltersburg Formation
|
formation
|
|
|
|
Menard Limestone
|
Vienna Limestone
|
|
| Waltham Formation
|
formation
|
|
|
|
|
|
|
| Walton Formation
|
formation
|
|
|
|
|
|
|
| Wamsutta Formation
|
formation
|
|
|
|
|
|
|
| Wanakah Formation
|
formation
|
|
|
|
|
|
|
| Wanapum Basalt
|
formation
|
|
|
|
|
|
|
| Wando Formation
|
formation
|
|
|
|
|
|
|
| Wann Formation
|
formation
|
|
|
|
|
|
|
| Wapanucka Limestone
|
formation
|
|
|
|
|
|
|
| Wapiti Formation
|
formation
|
|
|
|
|
Puskwaskau Formation
|
|
| Wapsipinicon Formation
|
formation
|
|
|
|
|
|
|
| Wardell Formation
|
formation
|
|
|
|
|
|
|
| Warley Hill Marl
|
formation
|
|
|
|
|
|
|
| Warner Formation
|
formation
|
|
|
|
|
|
|
| Warrior Formation
|
formation
|
|
|
|
Gatesburg Formation
|
|
|
| Warsaw Formation
|
formation
|
|
|
|
Salem Formation
|
Keokuk Limestone
|
|
| Warsaw Limestone
|
formation
|
|
|
|
|
|
|
| Wasatch Formation
|
formation
|
|
|
|
|
|
|
| Washakie Formation
|
formation
|
|
|
|
|
|
|
| Washburn Group
|
group
|
|
|
|
|
|
|
| Washington Formation
|
formation
|
|
|
|
Greene Formation
|
Monongahela Formation
|
|
| Washita Formation
|
formation
|
|
|
|
|
|
|
| Washita Group
|
formation
|
|
|
|
|
|
|
| Wassonville Formation
|
formation
|
|
|
|
|
|
|
| Wassuk Group
|
group
|
|
|
|
|
|
|
| Watahomigi Formation
|
formation
|
|
|
|
Manakacha Formation
|
Surprise Canyon Formation
|
|
| Waterford Group
|
group
|
|
|
|
|
|
|
| Watson Ranch Quartzite
|
formation
|
|
|
|
|
|
|
| Waubakee Formation
|
formation
|
|
|
|
|
Racine Formation
|
|
| Waukesha Dolomite
|
formation
|
|
|
|
|
|
|
| Wautubbee Formation
|
formation
|
|
|
|
|
|
|
| Waverly Group
|
group
|
|
|
|
|
|
|
| Waverly Sandstone
|
formation
|
|
|
|
|
|
|
| Wayan Formation
|
formation
|
|
|
|
Sage Junction Formation
|
|
|
| Wayland Formation
|
formation
|
|
|
|
|
|
|
| Wayne Formation
|
formation
|
|
|
|
|
|
|
| Waynesboro Formation
|
formation
|
|
|
|
Elbrook Formation
|
Antietam Formation
Tomstown Dolomite
|
|
| Waynesburg Formation
|
formation
|
|
|
|
|
|
|
| Waynesville Formation
|
formation
|
|
|
|
Liberty Formation
|
Arnheim Formation
|
|
| Weaubleau structure
|
formation
|
|
|
|
|
|
|
| Weber Formation
|
formation
|
|
|
|
|
|
|
| Weberg Formation
|
formation
|
|
|
|
|
|
|
| Weches Formation
|
formation
|
|
|
|
|
|
|
| Weeks Formation
|
formation
|
|
|
|
|
|
|
| Wehutty Formation
|
formation
|
|
|
|
|
|
|
| Weiser Basalt
|
formation
|
|
|
|
|
|
|
| Welden Limestone
|
formation
|
|
|
|
|
|
|
| Wellborn Formation
|
formation
|
|
|
|
|
|
|
| Wellington Formation
|
formation
|
|
|
|
|
|
|
| Wells Creek Formation
|
formation
|
|
|
|
Black River Group
|
Knox Group
|
|
| Weno Formation
|
formation
|
|
|
|
|
|
|
| Wenonah Formation
|
formation
|
|
|
|
Mount Laurel Formation
|
Marshalltown Formation
|
|
| Wepo Formation
|
formation
|
|
|
|
|
|
|
| Wescogame Formation
|
formation
|
|
|
|
Esplanade Sandstone
|
Manakacha Formation
|
|
| Wesley Shale
|
formation
|
|
|
|
|
|
|
| West Canyon Limestone
|
formation
|
|
|
|
|
|
|
| West Castleton Formation
|
formation
|
|
|
|
|
|
|
| West Falls Group
|
formation
|
|
|
|
Java Formation
|
Sonyea Group
|
|
| West Fork Formation
|
formation
|
|
|
|
|
|
|
| West Range Limestone
|
formation
|
|
|
|
|
|
|
| West River Shale
|
formation
|
|
|
|
|
|
|
| West Water Formation
|
formation
|
|
|
|
|
|
|
| Westerville Formation
|
formation
|
|
|
|
|
|
|
| Westmoreland Formation
|
formation
|
|
|
|
|
|
|
| Weston Shale
|
formation
|
|
|
|
|
|
|
| Wetumka Formation
|
formation
|
|
|
|
|
|
|
| Weverton Formation
|
formation
|
|
|
|
Harpers Formation
|
Catoctin Formation
|
|
| Wewoka Formation
|
formation
|
|
|
|
|
|
|
| Wewoka Shale
|
formation
|
|
|
|
|
|
|
| Weymouth Formation
|
formation
|
|
|
|
|
|
|
| Wheatland Formation
|
formation
|
|
|
|
|
|
|
| Wheeler Shale
|
formation
|
|
|
|
|
|
|
| Whetstone Gulf
|
formation
valley
|
|
|
|
|
|
|
| Whidbey Formation
|
formation
|
|
|
|
|
|
|
| Whipple Cave Formation
|
formation
|
|
|
|
|
|
|
| Whirlpool Sandstone
|
formation
|
|
|
|
Power Glen Shale
|
Queenston Shale
|
|
| Whirlwind Creek Group
|
formation
|
|
|
|
|
|
|
| Whiskey Canyon Limestone
|
formation
|
|
|
|
|
|
|
| White Bluff Formation
|
formation
|
|
|
|
|
|
|
| White Knob Formation
|
formation
|
|
|
|
|
|
|
| White Narrows Formation
|
formation
|
|
|
|
|
|
|
| White Pine Shale
|
formation
|
|
|
|
|
|
|
| White Rim Sandstone
|
formation
member
|
|
|
|
De Chelly Sandstone
Kaibab Limestone
|
Organ Rock Formation
|
|
| White River Formation
|
formation
group
|
|
|
|
|
Pierre Shale
Golden Valley Formation
|
|
| White Tail Ridge Formation
|
formation
|
|
|
|
|
|
|
| Whitehall Formation
|
formation
|
|
|
|
|
|
|
| Whitehorse Formation
|
formation
|
|
|
|
|
|
|
| Whitesburg Formation
|
formation
|
|
|
|
|
|
|
| Whitewater Formation
|
formation
|
|
|
|
Brassfield Formation
|
Dillsboro Formation
|
|
| Whitewood Limestone
|
formation
|
|
|
|
|
|
|
| Wichita Formation
|
formation
|
|
|
|
|
|
|
| Wichita Granite Group
|
group
|
|
|
|
|
|
|
| Wichita Group
|
formation
|
|
|
|
|
|
|
| Wicomico Formation
|
formation
|
|
|
|
|
|
|
| Wiggins Formation
|
formation
|
|
|
|
|
|
|
| Wilberns Formation
|
formation
|
|
|
|
|
|
|
| Wilcox Formation
|
formation
|
|
|
|
|
|
|
| Wilcox Group
|
group
|
|
|
|
|
Midway Group
|
|
| Wild Cow Formation
|
formation
|
|
|
|
Bursum Formation
|
Los Moyos Limestone
|
|
| Wildcat Group
|
formation
|
|
|
|
|
|
|
| Wildcat Hills Beds
|
formation
|
|
|
|
|
|
|
| Wildhorse Mountain Formation
|
formation
|
|
|
|
|
|
|
| Wilhelmi Formation
|
formation
|
|
|
|
|
|
|
| Wilhite Formation
|
formation
|
|
|
|
|
|
|
| Willard Creek Quartzite
|
formation
|
|
|
|
|
|
|
| Williams Fork Formation
|
formation
|
|
|
|
|
|
|
| Williams Formation
|
formation
|
|
|
|
|
|
|
| Williamsburg Formation
|
formation
|
|
|
|
|
|
|
| Williamson Shale
|
formation
|
|
|
|
|
|
|
| Williamsport Formation
|
formation
|
|
|
|
Wills Creek Formation
|
Mifflintown Formation
|
|
| Williston Formation
|
formation
|
|
|
|
|
|
|
| Willoughby Limestone
|
formation
|
|
|
|
|
|
|
| Willow Tank Formation
|
formation
|
|
|
|
|
|
|
| Willowvale Formation
|
formation
|
|
|
|
|
|
|
| Willowvale Shale
|
formation
|
|
|
|
|
|
|
| Wills Creek Formation
|
formation
|
|
|
|
Tonoloway Formation
|
Williamsport Formation
|
|
| Wills Point Formation
|
formation
|
|
|
|
|
|
|
| Willwood Formation
|
formation
|
|
|
|
|
|
|
| Wilson Grove Formation
|
formation
|
|
|
|
|
|
|
| Winchell Formation
|
formation
|
|
|
|
|
|
|
| Wind River Formation
|
formation
|
|
|
|
|
|
|
| Windfall Formation
|
formation
|
|
|
|
Pogonip Group
|
Dunderberg Shale
|
|
| Windmill Limestone
|
formation
|
|
|
|
|
|
|
| Windous Butte Formation
|
formation
|
|
|
|
|
|
|
| Windrow Formation
|
formation
|
|
|
|
|
|
|
| Winfield Formation
|
formation
|
|
|
|
|
|
|
| Wingate Sandstone
|
formation
|
|
|
|
|
|
|
| Winnemucca Formation
|
formation
|
|
|
|
|
|
|
| Winnipeg Formation
|
formation
|
|
|
|
|
|
|
| Winona Formation
|
formation
|
|
|
|
|
Tallahatta Formation
|
|
| Winslow Formation
|
formation
|
|
|
|
|
|
|
| Winterhaven Formation
|
formation
|
|
|
|
|
|
|
| Wiota Gravels
|
formation
|
|
|
|
|
|
|
| Wiscoy Sandstone
|
formation
|
|
|
|
|
|
|
| Wise Formation
|
formation
|
|
|
|
|
|
|
| Wise Lake Formation
|
formation
|
|
|
|
|
|
|
| Wissahickon Formation
|
formation
|
|
|
|
Hardyston Quartzite
|
|
|
| Witten Limestone
|
formation
|
|
|
|
|
|
|
| Witts Springs Formation
|
formation
|
|
|
|
|
|
|
| Wolcott Limestone
|
formation
|
|
|
|
|
|
|
| Wolf Mountain Shale
|
formation
|
|
|
|
|
|
|
| Wolfcamp Formation
|
formation
|
|
|
|
|
|
|
| Wolfe City Formation
|
formation
|
|
|
|
|
|
|
| Wolfe City Group
|
formation
|
|
|
|
|
|
|
| Wolsey Shale
|
formation
|
|
|
|
|
|
|
| Womble Shale
|
formation
|
|
|
|
Bigfork Chert
|
Blakely Sandstone
|
|
| Wood Canyon Formation
|
formation
|
|
|
|
Zabriskie Quartzite
|
Stirling Quartzite Formation
|
|
| Wood River Formation
|
formation
|
|
|
|
|
|
|
| Wood Siding Formation
|
formation
|
|
|
|
|
|
|
| Woodbine Formation
|
formation
|
|
|
|
Eagle Ford Group
Tokio Formation
|
Buda Limestone
|
|
| Woodbury Formation
|
formation
|
|
|
|
Englishtown Formation
|
Merchantville Formation
|
|
| Woodhouse Clay
|
formation
|
|
|
|
|
|
|
| Woodman Formation
|
formation
|
|
|
|
|
|
|
| Woods Hollow Formation
|
formation
|
|
|
|
|
|
|
| Woodside Formation
|
formation
|
|
|
|
|
|
|
| Woodstock Quartz Monzonite
|
formation
|
|
|
|
|
|
|
| Word Formation
|
formation
|
|
|
|
|
|
|
| Wray Channel Beds
|
formation
|
|
|
|
|
|
|
| Wreford Formation
|
formation
|
|
|
|
|
|
|
| Wreford Limestone
|
formation
|
|
|
|
Matfield Shale
|
Speiser Shale
|
|
| Wyandotte Formation
|
formation
|
|
|
|
|
|
|
| Wyemaha Formation
|
formation
|
|
|
|
|
|
|
| Wyman Formation
|
formation
|
|
|
|
|
|
|
| Yakataga Formation
|
formation
|
|
|
|
|
|
|
| Yale Point Sandstone
|
formation
|
|
|
|
|
|
|
| Yaquina Formation
|
formation
|
|
|
|
|
|
|
| Yates Formation
|
formation
|
|
|
|
|
|
|
| Yazoo Clay
|
formation
|
|
|
|
|
Moodys Branch Formation
|
|
| Yegua Formation
|
formation
|
|
|
|
|
|
|
| Yellow Hill Formation
|
formation
|
|
|
|
|
|
|
| Yellow Hill Limestone
|
formation
|
|
|
|
|
|
|
| Yellow Springs Group
|
formation
|
|
|
|
|
|
|
| Yellowjacket Formation
|
formation
|
|
|
|
|
|
|
| Yellowpine Limestone
|
formation
|
|
|
|
|
|
|
| Yeso Formation
|
formation
|
|
|
|
Glorieta Formation
|
Abo Formation
|
|
| Yorktown Formation
|
formation
|
|
|
|
|
|
|
| Yucca Mountain Tuff
|
formation
|
|
|
|
Tiva Canyon Tuff
|
|
|
| Zabriskie Quartzite
|
formation
|
|
|
|
Carrara Formation
|
Wood Canyon Formation
|
|
| Zeandale Limestone
|
formation
|
|
|
|
|
|
|
| Zia Sand
|
formation
|
|
|
|
|
|
|
_13.jpg)
_27_(40541680550).jpg)
_14_(48822462432).jpg)
.jpg)
,_Harvey_Quarry,_W_side_of_Rt._41,_S_of_Marquette,_UP_of_Michigan_4.jpg)
_7_(38417957134).jpg)
_6_(48810787362).jpg)
_3.jpg)
.jpg)
_3_(46672347301).jpg)
.jpg)
_1.jpg)
