Geologic units in Duchesne county, Utah

Duchesne River, Uinta and Bridger Formations (Middle Eocene to Early Oligocene) at surface, covers 46 % of this area

Duchesne River Fm, Uinta Formation (south of Uinta Mtns.) and Bridger Formation (north of Uinta Mtns.).

Glacial deposits (Quaternary) at surface, covers 17 % of this area

Glacial deposits

Eastern Uinta Basin Members of the Green River Formation (Eocene) at surface, covers 10 % of this area

Eastern Uinta Basin Members of the Green River Formation (Evacuation Creek Mbr, Parachute Creek Mbr (oil shale), Garden Gulch Mbr, and Douglas Creek Mbr.).

Uinta Mountain Group (including Red Pine Shale) (Proterozoic Y) at surface, covers 9 % of this area

Uinta Mountain Group (24,000 feet thick along the Green River). Red Pine Shale (950 my).

Older alluvial deposits (Quaternary) at surface, covers 5 % of this area

Older alluvial deposits

Alluvium and colluvium (Quaternary) at surface, covers 5 % of this area

Alluvium and colluvium

Bishop Conglomerate (Oligocene) at surface, covers 2 % of this area

Bishop Conglomerate.

Weber Sandstone (Pennsylvanian to Permian) at surface, covers 0.8 % of this area

Weber Sandstone.

Curtis Fm, Entrada Ss, and Carmel Fm (Middle to Late Jurassic) at surface, covers 0.6 % of this area

Curtis Fm, Entrada Ss, and Carmel Fm.

Humbug Formation and Deseret Limestone (Mississippian) at surface, covers 0.6 % of this area

Humbug Formation and Deseret Limestone.

Park City Formation (Permian) at surface, covers 0.5 % of this area

Park City Formation.

Moenkopi and Dinwoody Formations (Early Triassic) at surface, covers 0.5 % of this area

Moenkopi and Dinwoody Formations.

Madison Limestone (Mississippian) at surface, covers 0.4 % of this area

Madison Limestone.

Mancos Shale, Frontier Ss, and Mowry Shale (Late Cretaceous) at surface, covers 0.4 % of this area

Mancos Shale (Hilliard Shale and Blair Formation north of Uinta Mountains), Frontier Ss, and Mowry Shale.

Chinle Shale and Garta Sandstone Member (Late Triassic) at surface, covers 0.4 % of this area

Chinle Shale and Garta Sandstone Member.

Nugget (Navajo) Sandstone (Early Jurassic) at surface, covers 0.4 % of this area

Nugget (Navajo) Sandstone.

Mesaverde Group (Late Cretaceous) at surface, covers 0.3 % of this area

Mesaverde Group.

Landslides (Quaternary) at surface, covers 0.3 % of this area

Landslides

Morgan Formation and Round Valley Limestone (Pennsylvanian) at surface, covers 0.3 % of this area

Morgan Formation and Round Valley Limestone.

Morrison Formation (Late Jurassic) at surface, covers 0.2 % of this area

Morrison Formation (Dinosaur National Monument).

Wasatch/Colton Formations and Flagstaff Limestone (Early to Middle Eocene) at surface, covers 0.2 % of this area

Wasatch/Colton Formations and Flagstaff Limestone.

Doughnut Shale (Mississippian) at surface, covers 0.2 % of this area

Doughnut Shale.

Lodore Sandstone (Early to Middle Cambrian) at surface, covers 0.1 % of this area

Lodore Sandstone.

Dakota and Cedar Mountain Formations (Cretaceous) at surface, covers 0.1 % of this area

Dakota and Cedar Mountain Formations.

Maxfield Limestone (Middle Cambrian) at surface, covers < 0.1 % of this area

Maxfield Limestone.

Eolian deposits (Quaternary) at surface, covers < 0.1 % of this area

Eolian deposits