Geologic units in Uintah county, Utah

Eastern Uinta Basin Members of the Green River Formation (Eocene) at surface, covers 27 % 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.).

Duchesne River, Uinta and Bridger Formations (Middle Eocene to Early Oligocene) at surface, covers 27 % of this area

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

Alluvium and colluvium (Quaternary) at surface, covers 10 % of this area

Alluvium and colluvium

Older alluvial deposits (Quaternary) at surface, covers 7 % of this area

Older alluvial deposits

Bishop Conglomerate (Oligocene) at surface, covers 6 % of this area

Bishop Conglomerate.

Uinta Mountain Group (including Red Pine Shale) (Proterozoic Y) at surface, covers 4 % of this area

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

Mancos Shale, Frontier Ss, and Mowry Shale (Late Cretaceous) at surface, covers 3 % of this area

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

Glacial deposits (Quaternary) at surface, covers 2 % of this area

Glacial deposits

Wasatch/Colton Formations and Flagstaff Limestone (Early to Middle Eocene) at surface, covers 2 % of this area

Wasatch/Colton Formations and Flagstaff Limestone.

Weber Sandstone (Pennsylvanian to Permian) at surface, covers 2 % of this area

Weber Sandstone.

Park City Formation (Permian) at surface, covers 2 % of this area

Park City Formation.

Nugget (Navajo) Sandstone (Early Jurassic) at surface, covers 1 % of this area

Nugget (Navajo) Sandstone.

Landslides (Quaternary) at surface, covers 1 % of this area

Landslides

Madison Limestone (Mississippian) at surface, covers 1.0 % of this area

Madison Limestone.

Morgan Formation and Round Valley Limestone (Pennsylvanian) at surface, covers 0.9 % of this area

Morgan Formation and Round Valley Limestone.

Moenkopi and Dinwoody Formations (Early Triassic) at surface, covers 0.9 % of this area

Moenkopi and Dinwoody Formations.

Chinle Shale and Garta Sandstone Member (Late Triassic) at surface, covers 0.6 % of this area

Chinle Shale and Garta Sandstone Member.

Morrison Formation (Late Jurassic) at surface, covers 0.6 % of this area

Morrison Formation (Dinosaur National Monument).

Curtis Fm, Entrada Ss, and Carmel Fm (Middle to Late Jurassic) at surface, covers 0.5 % of this area

Curtis Fm, Entrada Ss, and Carmel Fm.

Dakota and Cedar Mountain Formations (Cretaceous) at surface, covers 0.5 % of this area

Dakota and Cedar Mountain Formations.

Mesaverde Group (Late Cretaceous) at surface, covers 0.4 % of this area

Mesaverde Group.

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

Eolian deposits

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

Lodore Sandstone.

Browns Park Formation (Miocene) at surface, covers < 0.1 % of this area

Browns Park Formation.

Weber Sandstone (Permian-Pennsylvanian) at surface, covers < 0.1 % of this area

Weber Sandstone

Park City Fm (Permian) at surface, covers < 0.1 % of this area

Calcareous siltstone and sandstone

Morrison, Curtis, and Entrada Fms (Jurassic) at surface, covers < 0.1 % of this area

In extreme southwestern Moffat County, includes thin wedge of Carmel Fm (red siltstone and sandstone) beneath Entrada