Region
California
161
United States
151
Pennsylvania
124
Alaska
116
Colorado
104
Montana
72
Nevada
68
North America
60
Powder River Basin (Wyo. and Mont.)
53
New Mexico
47
Utah
43
West Virginia
43
Arizona
42
Californie
42
Texas
40
Greenland
37
Idaho
36
Finland
35
Wyoming
35
Virginia
33
Germany
32
Virginie-Occidentale
32
Maine
30
San Bernardino County
28
Powder River Basin
26
Maryland
25
Hawaii
24
South Africa
24
New Jersey
23
États-Unis
21
France
21
Australia
20
Earth (Planet)
20
Florida
20
Kansas
20
Moon
20
New York (State)
20
Oregon
20
Washington (State)
20
Brazil
19
Pennsylvanie
19
McKinley County
18
Michigan
18
Norway
18
Ohio
18
South Carolina
18
San Bernardino (Comté)
17
West (U.S.)
17
Illinois
16
Italy
16
more ...