Region
United States
859
Utah
497
Colorado
344
Alaska
280
Wyoming
267
California
231
Montana
222
Nevada
218
Arizona
203
Mars (Planet)
200
Kentucky
176
New Mexico
164
San Juan County
147
England
120
Pennsylvania
113
Idaho
111
Germany
106
Massachusetts
95
France
78
New York (State)
77
Washington (State)
77
Italy
74
Nye County
72
Garfield County
70
Oregon
67
Michigan
63
Virginia
61
Maine
60
Connecticut
59
South Dakota
59
Austria
53
Kane County
53
North Carolina
46
Emery County
45
Great Britain
44
Missouri
44
Carbon County
43
Coconino County
43
New York
43
New Jersey
42
Jefferson County
41
Lincoln County
41
Fremont County
40
Texas
40
Grant County
37
Sweetwater County
35
Minnesota
32
Grand County
31
Powder River Basin (Wyo. and Mont.)
30
Wayne County
30
more ...