Region
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Piceance Creek Watershed
3
Powder River Basin (Wyo. and Mont.)
3
Raton Basin (Colo. and N.M.)
3
San Juan County
3
Virginia
3
Williams Fork Formation (Colo. and Utah)
3
Almond Formation
2
Almond Formation (Wyo.)
2
Antarctica
2
Bighorn Mountains (Wyo. and Mont.)
2
Black Mesa (Navajo County and Apache County)
2
Book Cliffs (Utah and Colo.)
2
Book Cliffs Region (Utah and Colo.)
2
Burke County
2
Cape Fear River Watershed
2
Charleston County
2
Colorado Plateau
2
Crazy Mountains
2
Dorchester County
2
Fayette County
2
Florida
2
Fort Peck
2
Fox Hills Formation
2
Gallatin County
2
Garfield County
2
Gulf Region
2
Hopi Indian Reservation
2
Hot Springs County
2
Jake Canyon Fault (Mont.)
2
Johnson County
2
Kane County
2
Kodiak Island Region
2
Lamar County
2
Lassiter Coast
2
Lincoln County
2
Logan County
2
Long Island
2
Mancos Shale
2
Maroon Formation (Colo.)
2
Martha's Vineyard
2
Matanuska River Valley
2
Mid-Atlantic Bight
2
Middle Atlantic States
2
Minnesota
2
Moffat County
2
Morrison Formation
2
National Petroleum Reserve
2
Natrona County
2
Navajo Indian Reservation
2
Nebraska
2
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