Geologic units in Utah county, Utah

Lake Bonneville deposits (Quaternary) at surface, covers 18 % of this area

Lake Bonneville deposits

Alluvium and colluvium (Quaternary) at surface, covers 17 % of this area

Alluvium and colluvium

Oquirrh Group, including Bridal Veil Limestone (Pennsylvanian to Permian) at surface, covers 15 % of this area

Oquirrh Group (maximum thickness 25,000 feet), including Bridal Veil Limestone.

Eastern Uinta Basin Members of the Green River Formation (Eocene) at surface, covers 8 % 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.).

Laguna Springs Latite, Tintic Mountain Group, Packard Quartz Latite, and Apex Conglomerate (Late Eocene to Oligocene) at surface, covers 6 % of this area

Laguna Springs Latite, Tintic Mountain Group (latite, porphyry & tuff), Packard Quartz Latite, and Apex Conglomerate.

North Horn Formation (Late Cretaceous to Eocene) at surface, covers 5 % of this area

North Horn Formation.

Great Blue Ls, Humbug Formation, and Deseret Limestone (Mississippian) at surface, covers 4 % of this area

Great Blue Ls, Humbug Formation, and Deseret Limestone.

Wasatch/Colton Formations and Flagstaff Limestone (Early to Middle Eocene) at surface, covers 4 % of this area

Wasatch/Colton Formations and Flagstaff Limestone.

North Horn and Currant Creek Formations (Late Cretaceous to Paleocene) at surface, covers 3 % of this area

North Horn and Currant Creek Formations.

North Horn and Canaan Peak Formations (Late Cretaceous to Paleocene) at surface, covers 3 % of this area

North Horn and Canaan Peak Formations.

Duchesne River, Uinta and Bridger Formations (Middle Eocene to Early Oligocene) at surface, covers 2 % 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 2 % of this area

Glacial deposits

Flagstaff Limestone (Late Paleocene to Early Eocene) at surface, covers 1 % of this area

Flagstaff Limestone.

Mesaverde Group (Late Cretaceous) at surface, covers 1 % of this area

Mesaverde Group.

Diamond Creek Sandstone and Kirkman Limestone (Early Permian) at surface, covers 1.0 % of this area

Diamond Creek Sandstone and Kirkman Limestone.

Manning Canyon Shale (Mississippian) at surface, covers 1.0 % of this area

Manning Canyon Shale.

Duchesne River, Uinta and Bridger Formations (Late Eocene to Early Oligocene) at surface, covers 0.9 % of this area

Duchesne River, Uinta and Bridger Formations

Older alluvial deposits (Quaternary) at surface, covers 0.9 % of this area

Older alluvial deposits

Price River Formation (Late Cretaceous) at surface, covers 0.8 % of this area

Price River Formation.

Marshes (Holocene) at surface, covers 0.8 % of this area

Marshes

Silver City Monzonite, Sunrise Peak Monzonite Porphyry, Swanson Quartz Monzonite (Late Eocene to Oligocene) at surface, covers 0.7 % of this area

Silver City Monzonite (31 my), Sunrise Peak Monzonite Porphyry, Swanson Quartz Monzonite

Maxfield Limestone and Ophir Formation (Middle Cambrian) at surface, covers 0.7 % of this area

Maxfield Limestone (Opex Fm, Cole Canyon Dm, Bluebird Dm, Herkimer Ls, Dagmar Dm, and Teutonic Ls) and Ophir Formation.

Clayton Peak and Pine Creek stocks (Late Eocene to Oligocene) at surface, covers 0.6 % of this area

Clayton Peak and Pine Creek stocks.

Park City and Phosphoria Formations (Permian) at surface, covers 0.5 % of this area

Park City and Phosphoria Formations.

Tintic Quartzite (Early to Middle Cambrian) at surface, covers 0.5 % of this area

Tintic Quartzite.

Gardison Limestone and Fitchville Formation (Late Devonian to Mississippian) at surface, covers 0.4 % of this area

Gardison Limestone and Fitchville Formation.

Salt Lake Formation (?) and other Basin & Range valley-filling alluvial, lacustrine, and volcanic materials (Middle Miocene to Late Pliocene) at surface, covers 0.4 % of this area

Salt Lake Formation (?) and other Basin & Range valley-filling alluvial, lacustrine, and volcanic materials. Valley fill is more than 13,000 feet thick in the central part of Utah Valley.

Flagstaff Formation (Late Paleocene to Early Eocene) at surface, covers 0.4 % of this area

Flagstaff Formation.

Precambrian rocks of the Canyon Range (Proterozoic Z) at surface, covers 0.3 % of this area

Precambrian rocks of the Canyon Range (Mutual Fm, Inkom Fm, Caddy Canyon Qtz, Papoose Creek Fm, Blackrock Canyon Ls, and upper part of Pocatello Fm).

Alluvial materials, Axtell and Harkers Formations (Pliocene to Quaternary) at surface, covers 0.3 % of this area

Alluvial materials, Axtell and Harkers Formations

Gardison and Lodgepole Limestones (Mississippian) at surface, covers 0.3 % of this area

Gardison and Lodgepole Limestones.

Arapien Shale (Middle Jurassic) at surface, covers 0.3 % of this area

Arapien Shale (Summerville Formation, Entrada Sandstone and Carmel Formation).

Bloomington Formation, Maxfield Limestone, and Ophir Formations (Middle Cambrian) at surface, covers 0.3 % of this area

Bloomington Formation, Maxfield Limestone, and Ophir Formations.

Pinyon Peak Limestone and Victoria Formation (Devonian) at surface, covers 0.2 % of this area

Pinyon Peak Limestone and Victoria Formation.

Indianola Formation (Cretaceous) at surface, covers 0.2 % of this area

Indianola Formation.

Fish Haven Dolomite and Opohonga Limestone (Ordovician) at surface, covers 0.2 % of this area

Fish Haven Dolomite and Opohonga Limestone.

Bluebell Dolomite (Late Ordovician to Silurian) at surface, covers 0.1 % of this area

Bluebell Dolomite.

Navajo/Nugget Sandstone (Early Jurassic) at surface, covers 0.1 % of this area

Navajo/Nugget Sandstone.

Basalts (Pliocene) at surface, covers 0.1 % of this area

Basalts

Doughnut Formation (Mississippian) at surface, covers 0.1 % of this area

Doughnut Formation.

Morgan Formation and Round Valley Limestone (Pennsylvanian) at surface, covers 0.1 % of this area

Morgan Formation and Round Valley Limestone.

Keetley Volcanics (Late Eocene to Oligocene) at surface, covers < 0.1 % of this area

Keetley Volcanics

Ajax Dolomite and Opex Formation (Middle Cambrian to Early Ordovician) at surface, covers < 0.1 % of this area

Ajax Dolomite and Opex Formation (upper member of Maxfield Limestone).

Thaynes Formation and Woodside Shale (Early Triassic) at surface, covers < 0.1 % of this area

Thaynes Formation and Woodside Shale.

Ankareh Shale (Middle to Late Triassic) at surface, covers < 0.1 % of this area

Ankareh Shale.

Wasatch Formation (Late Paleocene to Early Eocene) at surface, covers < 0.1 % of this area

Wasatch Formation.

Morrison Formation (Late Jurassic) at surface, covers < 0.1 % of this area

Morrison Formation.

Beirdneau Sandstone, Hyrum Dolomite, and Water Canyon Formation (Devonian) at surface, covers < 0.1 % of this area

Beirdneau Sandstone, Hyrum Dolomite, and Water Canyon Formation.

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

Landslides

Park City and Phosphoria Formations (Permian) at surface, covers < 0.1 % of this area

Park City and Phosphoria Formations.

St. Charles Formation and Nounan Dolomite (Middle Cambrian to Early Ordovician) at surface, covers < 0.1 % of this area

St. Charles Formation and Nounan Dolomite.

Thanes Formation, Woodside Shale, and Dinwoody Formation (Early Triassic) at surface, covers < 0.1 % of this area

Thanes Formation, Woodside Shale, and Dinwoody Formation.

Miocene volcanic rocks, undivided (Late Oligocene to Middle Miocene) at surface, covers < 0.1 % of this area

In Western Utah: Quichapa Group and other volcanic rocks (Tmb,Tmr,Tma). In Central Utah: Silver Shield Latite (17 my) and Pinyon Creek Conglomerate.