Region
Utah
12
United States
7
Colorado
5
Alaska
4
Uinta Basin (Utah and Colo.)
4
Mexico, Gulf of
3
California
2
Hawaii
2
Henry Mountains
2
Wasatch Fault Zone (Utah and Idaho)
2
Wyoming
2
Alaska Peninsula
1
Aleutian Islands
1
Big Thompson River Valley
1
Bowdoin National Wildlife Refuge (Mont.)
1
Buffalo Bayou Watershed
1
Caribbean Area
1
Cedar Valley (Iron County, Utah)
1
Cibola County
1
Coalville
1
Cook Inlet Region
1
Deer Creek (Summit County, Colo.)
1
Dinosaur National Monument (Colo. and Utah)
1
Florida
1
Green River Watershed (Wyo.-Utah)
1
Henry Mountains (Utah)
1
Iron County
1
Juab County
1
Kilauea Volcano
1
Kilauea Volcano (Hawaii)
1
Long Valley Caldera
1
Massachusetts
1
Mead, Lake, Region (Ariz. and Nev.)
1
Mississippi River Valley
1
Montana
1
Morgan County
1
Nephi (Utah)
1
Nevada
1
New Mexico
1
North Slope
1
Northern Hemisphere
1
Oregon
1
Oregon, Eastern
1
Park County
1
Piceance Creek Basin
1
Piceance Creek Basin (Colo.)
1
Rio Grande Rift
1
Rocky Mountains
1
San Rafael Swell
1
San Rafael Swell (Utah)
1
more ...