Region
New Mexico
12
Colorado
11
Montana
7
North Dakota
6
United States
4
Texas
3
Chaffee County
2
Deer Lodge Valley
2
Garfield County
2
Utah
2
West (U.S.)
2
Wyoming
2
Alaska
1
Arkansas River
1
Australia
1
Awash River Valley
1
Awash River Valley (Ethiopia)
1
Barbados
1
Benson County
1
Bering Glacier (Alaska)
1
Bering Glacier Region
1
Bering Glacier Region (Alaska)
1
Big Sandy Creek Valley (Colo.)
1
Bitterroot River Valley
1
Blaine County
1
Box Butte County
1
Brown's Canyon (Chaffee County, Colo.)
1
California
1
California, Southern
1
Canada
1
Carlsbad Region
1
Castle Valley (Emery County)
1
Cavalier County
1
Chaffee County (Colo.)
1
Cold regions
1
Colfax County
1
Converse County
1
Danville
1
Delta County
1
Denver Basin
1
Dinosaur Ridge
1
Douglas County
1
Doña Ana County
1
Eddy County
1
El Paso County
1
Elbert County
1
England
1
Ethiopia
1
Flathead County
1
Four Corners Region
1
more ...