Geography
Colorado
Wyoming
162 results
Utah
57 results
United States
22 results
Green River Formation
17 results
Montana
15 results
Arizona
9 results
Idaho
9 results
New Mexico
9 results
Albany County
7 results
Kansas
7 results
Larimer County
7 results
Moffat County
7 results
Nevada
7 results
South Dakota
7 results
Nebraska
6 results
Green River Watershed (Wyo.-Utah)
5 results
North Dakota
5 results
Sweetwater County
5 results
Green River Watershed (Wyoming-Utah)
4 results
Laramie County
4 results
Wasatch Formation
4 results
West (U.S.)
4 results
Yampa River
4 results
Yampa River Watershed
4 results
California
3 results
Daggett County
3 results
Mesaverde Group
3 results
Texas
3 results
Washington (State)
3 results
Arches National Park (Utah)
2 results
Black Canyon of the Gunnison National Park (Colo.)
2 results
Bryce Canyon National Park (Utah)
2 results
Canyonlands National Park (Utah)
2 results
Capitol Reef National Park (Utah)
2 results
Cedar Breaks National Monument (Utah)
2 results
Colorado National Monument (Colo.)
2 results
Curecanti National Recreation Area (Colo.)
2 results
Dinosaur National Monument (Colo. and Utah)
2 results
Fossil Butte National Monument (Wyo.)
2 results
Front Range
2 results
Front Range (Colo. and Wyo.)
2 results
Golden Spike National Historic Site (Utah)
2 results
Green River (Wyoming-Utah)
2 results
Hovenweep National Monument (Utah and Colo.)
2 results
Lance Formation (Colo. and Wyo.)
2 results
Natural Bridges National Monument (Utah)
2 results
Oklahoma
2 results
Oregon
2 results
Piceance Creek Basin (Colo.)
2 results
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