Region
Utah
Colorado
147
United States
95
Wyoming
70
Nevada
61
Arizona
50
San Juan County
47
Wasatch Range (Utah and Idaho)
32
Idaho
29
Juab County
29
New Mexico
24
Carbon County
23
Emery County
23
Grand County
21
Paradox Formation
21
Garfield County
18
California
17
Marysvale Region
17
Canyonlands National Park
15
Henry Mountains
15
Uinta Basin (Utah and Colo.)
14
Zion National Park
14
Green River Formation
13
Kaiparowits Plateau
13
La Sal Mountains
13
Utah County
13
Montana
12
Paradox Basin
12
Wasatch Range
12
Washington County
12
Canyonlands National Park (Utah)
11
Great Basin
11
Millard County
11
Great Salt Lake
10
Oquirrh Mountains
10
Salt Lake County
10
Wasatch, Monts (Utah et Idaho)
10
West (U.S.)
10
Arches National Park
9
Arches National Park (Utah)
9
Grand Staircase-Escalante National Monument (Utah)
9
Straight Cliffs Formation (Utah)
9
Uinta Basin
9
White Rim Sandstone (Utah)
9
Chinle Formation
8
Daggett County
8
Grand Staircase-Escalante National Monument
8
Henry Mountains (Utah)
8
Kane County
8
Tooele County
8
more ...