Geography
Powder River Basin (Wyo. and Mont.)
39 results
California
37 results
Nevada
26 results
Montana
20 results
Alaska
19 results
Colorado
17 results
Wyoming
15 results
Idaho
11 results
New Mexico
10 results
Utah
10 results
Saudi Arabia
7 results
Arizona
6 results
Washington (State)
6 results
Egypt
5 results
Oregon
5 results
Texas
4 results
Beaufort Sea
3 results
Brooks Range
3 results
Canada
3 results
China
3 results
Creede Formation
3 results
Creede Formation (Colo.)
3 results
Florida
3 results
France
3 results
Great Britain
3 results
Indiana
3 results
Ireland
3 results
Mississippi
3 results
San Juan Basin (N.M. and Colo.)
3 results
United States
3 results
West (U.S.)
3 results
Yucca Mountain
3 results
Alameda County
2 results
Appalachian Basin
2 results
Arkansas
2 results
Beaverhead County
2 results
California, Northern
2 results
California, Southern
2 results
Churchill County
2 results
Connecticut
2 results
Dawes County
2 results
England
2 results
Fremont County
2 results
Front Range (Colo. and Wyo.)
2 results
Georgia
2 results
Horn Island
2 results
Horse Range
2 results
Humboldt County
2 results
Lincoln County
2 results
Louisiana
2 results
more…