Region
Alaska
8
Montana
6
Balochistan Region
5
Pakistan
5
Black Hills (S.D. and Wyo.)
4
South Dakota
4
United States
4
New Mexico
3
North Dakota
3
Utah
3
British Columbia
2
Colorado
2
Massachusetts
2
Mexico
2
Missouri
2
North Atlantic Ocean
2
San Juan County
2
San Miguel County
2
Arkansas
1
Australia
1
Bayfield County
1
Bayfield County (Wis.)
1
Berkshire County
1
Billings County
1
Blake Plateau
1
California
1
Canada
1
Charleston Region
1
Colorado Plateau
1
Colorado River Watershed (Colo.-Mexico)
1
Connecticut
1
Cumberland Mountains
1
Danville Region
1
Dolores County
1
Douglas County
1
Douglas County (Wis.)
1
Fresno County
1
Front Range (Colo. and Wyo.)
1
Garfield County
1
Garfield County (Utah)
1
Georgia Embayment
1
Golden Valley County
1
Grand Banks of Newfoundland
1
Gulf States
1
Hawaii
1
Hettinger County
1
Indonesia
1
Iowa
1
Kane County
1
Kansas
1
more ...