Region
Colorado
Green River Formation
15
Piceance Creek Basin
7
Utah
7
Wyoming
5
Piceance Creek Watershed
4
Florissant Fossil Beds National Monument (Colo.)
2
Piceance Creek Basin (Colo.)
2
Florissant Fossil Beds National Monument
1
Great River Basin
1
Green River Watershed (Wyo.-Utah)
1
Moffat County
1
Piceance Creek Region
1
Piceance Creek Valley
1
Sand Wash Basin (Colo. and Wyo.)
1
Uinta Basin (Utah and Colo.)
1
Uinta Formation (Utah)
1
Wasatch Formation
1
Western Slope (Colo.)
1