Region
United States
17
Colorado
15
Utah
15
Peru
9
Wyoming
9
Arizona
7
Chile
5
Texas
5
West (U.S.)
5
Carbon County
4
Nevada
4
Idaho
3
Alaska
2
Australia
2
Bighorn Basin (Mont. and Wyo.)
2
Colorado Plateau
2
Garfield County
2
Gila County
2
Michigan
2
Minnesota
2
Mohave County
2
Montana
2
Montrose County
2
Morrison Formation
2
New Hampshire
2
New Mexico
2
Piute County
2
South Dakota
2
Washington (State)
2
Wayne County
2
Wisconsin
2
Antofagasta (Region)
1
Appalachian Region
1
Arkansas River Watershed
1
Ayabaca
1
Ayacucho Watershed
1
Beaver County
1
Boulder Batholith Region
1
California
1
Capitol Reef Region
1
Catron County
1
Chota (Province)
1
Connecticut
1
Copiapó Region
1
Cuzco-Anta region
1
Cuzco-Ayaviri region
1
East (U.S.)
1
Elliot Lake Region
1
Elqui-Vicuña region
1
Fall River County
1
more ...