Region
California
65
New Mexico
40
Wyoming
37
Utah
32
Montana
25
New York (State)
25
United States
23
Colorado
21
Nevada
21
New Brunswick
19
Alberta
18
Nova Scotia
18
Idaho
16
Appalachian Mountains
15
California, Southern
15
Texas
15
Arizona
14
Mexico
14
Southern California
14
Maine
12
Massachusetts
12
Virginia
11
Washington (State)
11
Chicago
10
Great Basin
10
Illinois
10
Vermont
10
Maryland
9
Connecticut
8
West (U.S.)
8
Australia
7
Colorado Plateau
7
Italy
7
New Hampshire
7
Rocky Mountains
7
Sierra Nevada (Calif. and Nev.)
7
Brazil
6
Cascade Range
6
France
6
Rhode Island
6
San Andreas Fault (Calif.)
6
Uinta Basin (Utah and Colo.)
6
Alaska
5
Blue Ridge Mountains
5
British Columbia
5
California, Northern
5
Florida
5
Monterey Formation (Calif.)
5
New England
5
Northern California
5
more ...