Region
Wyoming
Sweetwater County
35
Fremont County
32
Carbon County
25
Campbell County
23
Albany County
17
Teton County
14
Colorado
13
Platte County
13
Montana
11
Sheridan County
9
Utah
9
Sublette County
8
Weston County
8
Green River Formation
7
Johnson County
7
Lincoln County
7
Crook County
6
Converse County
5
Hot Springs County
5
Natrona County
5
South Dakota
5
Big Horn County
4
Park County
4
Wasatch Formation
4
Yellowstone National Park
4
Fort Union Formation
3
Larimer County
3
Moffat County
3
Uinta County
3
Carter County
2
Goshen County
2
Laramie County
2
Medicine Bow Mountains (Colo. and Wyo.)
2
Nebraska
2
Niobrara County
2
Powder River County
2
Truman Draw Quadrangle
2
Washakie County
2
Wind River Basin
2
Appel Butte Quadrangle
1
Beaver Divide
1
Bighorn Basin (Mont. and Wyo.)
1
Birney quadrangle
1
Bonneville County
1
Buffalo quadrangle
1
Butte County
1
Cache County
1
Canyon Village
1
Clark Quadrangle
1
more ...