Region
Texas
24
New Mexico
15
Utah
14
Kansas
12
North America
12
Wyoming
8
California
7
West (U.S.)
7
Colorado
6
Arizona
5
South Dakota
5
China
4
Illinois
4
Antarctica
3
Canada
3
Earth (Planet)
3
Great Basin
3
Idaho
3
Montana
3
Nebraska
3
Nevada
3
Oklahoma
3
Oregon
3
Peru
3
United States
3
Alberta
2
Australia
2
British Columbia
2
Burgess Shale (B.C.)
2
Europe
2
Germany
2
Grand Staircase-Escalante National Monument
2
Grand Staircase-Escalante National Monument (Utah)
2
Iowa
2
Louisiana
2
Mexico
2
Nunavut
2
Sierra County
2
Southwestern States
2
Yoho National Park
2
Afghanistan
1
Africa
1
Alabama
1
Appalachian Basin
1
Arabian Peninsula
1
Arctic regions
1
Asia
1
Bad Lands
1
Baffin Island
1
Baynunah Formation (United Arab Emirates)
1
more ...