Region
Michigan
11
Colorado
10
Arizona
9
Montana
8
Idaho
7
Middle West
4
United States
4
Wyoming
4
Brazil
3
Mexico
3
California
2
Clear Creek County
2
Clearwater County
2
Gila County
2
Gilpin County
2
Glacier National Park
2
Gogebic County
2
Grand Canyon
2
Idaho Batholith (Idaho and Mont.)
2
Isle Royale
2
Marquette County
2
Massachusetts
2
Missouri
2
Nevada
2
Park Range (Colo. and Wyo.)
2
Rocky Mountains
2
Shoshone County
2
Superior, Lake
2
Yavapai County
2
Alaska
1
Australia
1
Baltic Shield
1
Berkshire County
1
Boulder Batholith (Mont.)
1
Bradshaw Mountains
1
Brady Butte Region
1
Butte
1
Canada
1
Casper Mountain (Mountain)
1
China
1
Clinton County
1
Connecticut
1
Copper Harbor Conglomerate (Mich.)
1
Custer County
1
Delaware Water Gap (N.J. and Pa.)
1
East (U.S.)
1
Finland
1
Fremont County
1
Front Range (Colo. and Wyo.)
1
Glacier National Park (Mont.)
1
more ...