Region
Montana
Wyoming
8
Idaho
7
Phosphoria Formation
6
Judith River Formation
3
Lakota Formation
3
North Dakota
3
Fort Belknap Indian Reservation
2
Madison Group
2
Missouri River Watershed
2
Park County
2
Ruby Range
2
Beaverhead County
1
Big Belt Mountains
1
Big Belt Mountains (Mont.)
1
Bighorn Mountains (Wyo. and Mont.)
1
Black Hills (S.D. and Wyo.)
1
Blackleaf Formation
1
Blacktail Mountains Region
1
Boulder Batholith (Mont.)
1
Butte
1
Castle Mountains
1
Craig Region
1
Crazy Mountains
1
Fort Peck
1
Frontier Formation
1
Gallatin County
1
Glacier National Park
1
Glacier National Park (Mont.)
1
Glacier National Park Region
1
Jake Canyon Fault (Mont.)
1
Madison County
1
Madison Range
1
Phillips County
1
Prichard Formation
1
Richland County
1
Sanders County
1
Saskatchewan
1
Sliderock Mountain (Sweet Grass County)
1
Sliderock Mountain (Sweet Grass County, Mont.)
1
Snowslip Formation (Mont.)
1
Tendoy Mountains
1
Tobacco Root Mountains
1
Utah
1
Washington (State)
1
Yellowstone National Park
1