Geography
United States
Colorado
25 results
Utah
21 results
New Mexico
14 results
Uinta Basin (Utah and Colo.)
11 results
Uinta Basin
10 results
Wyoming
9 results
Green River Formation
8 results
San Juan Basin (N.M. and Colo.)
7 results
Arizona
6 results
San Juan Basin
6 results
Southern States
6 results
Canada
5 results
Green River Watershed (Wyo.-Utah)
5 results
Green River Watershed (Wyoming-Utah)
5 results
Gulf Coast (U.S.)
5 results
Idaho
5 results
Montana
5 results
Piceance Creek Basin
5 results
Chinle Formation
4 results
Colorado Plateau
4 results
Gulf Coast
4 results
Illinois Basin
4 results
Mesaverde Group
4 results
Morrison Formation
4 results
Paradox Basin
4 results
Powder River Basin
4 results
Powder River Basin (Wyo. and Mont.)
4 results
Sierra Nevada
4 results
Sierra Nevada (Calif. and Nev.)
4 results
Anadarko Basin
3 results
Black Hills
3 results
Black Hills (S.D. and Wyo.)
3 results
California
3 results
Delmarva Peninsula
3 results
Frontier Formation
3 results
Gulf States
3 results
Hopi Indian Reservation
3 results
Idaho Batholith
3 results
Idaho Batholith (Idaho and Mont.)
3 results
Mississippi Embayment
3 results
Navajo Indian Reservation
3 results
Oklahoma
3 results
Paradox Formation
3 results
Texas
3 results
Uinta Mountains (Utah and Wyo.)
3 results
Wasatch Range
3 results
Wasatch Range (Utah and Idaho)
3 results
Atlantic Coast
2 results
Atlantic Coast (U.S.)
2 results
more…