Region
United States
1,068
England
461
Great Britain
187
Arkansas
82
Little Rock
73
California
71
Little Rock (Ark.)
39
Idaho
34
Nevada
34
Australia
32
Canada
29
Montana
27
États-Unis
27
Alaska
25
New York (State)
24
Utah
24
Ireland
22
Arizona
21
Illinois
20
Standing Rock Indian Reservation (N.D. and S.D.)
20
Texas
20
Phosphoria Formation
19
Michigan
18
New York
18
Earth (Planet)
17
Colorado
16
Southern States
16
Los Angeles
15
Tennessee
15
Washington (D.C.)
15
Wyoming
15
New York (N.Y.)
13
North America
13
Ohio
13
West (U.S.)
13
New Mexico
12
San Francisco
12
Wisconsin
12
Latin America
11
Louisiana
11
Washington (State)
11
California, Southern
10
Memphis
10
Mexico
10
Oregon
10
Scotland
10
Virginia
10
Africa, Southern
9
City of Rocks National Reserve (Idaho)
9
Minnesota
9
more ...