Geography
United States
543 results
New Mexico
152 results
Great Britain
116 results
Wyoming
108 results
Illinois
95 results
Montana
94 results
Pennsylvania
83 results
Utah
81 results
Colorado
68 results
Alaska
67 results
England
60 results
McKinley County
55 results
Kentucky
51 results
San Juan County
49 results
San Juan County (N.M.)
36 results
Alabama
35 results
Campbell County
35 results
Ohio
35 results
West Virginia
33 results
Pakistan
31 results
Powder River Basin (Wyo. and Mont.)
30 results
Tennessee
30 results
Texas
27 results
Virginia
25 results
Oklahoma
24 results
Indiana
22 results
Sandoval County
22 results
Powder River County
21 results
Scotland
19 results
Washington (State)
19 results
Johnson County
17 results
West (U.S.)
17 results
Europe
16 results
Kansas
16 results
Sheridan County
16 results
Big Horn County
15 results
Campbell County (Wyo.)
15 results
Fort Union Formation
14 results
Kane County
14 results
London
14 results
Rio Arriba County
14 results
Canal Zone
13 results
Carbon County
13 results
Germany
13 results
Sindh
13 results
Rio Arriba County (N.M.)
12 results
Sandoval County (N.M.)
12 results
Custer County
11 results
Emery County
10 results
Garfield County
10 results
more…