Geologic units in Salt Lake county, Utah

Lake Bonneville deposits (Quaternary) at surface, covers 30 % of this area

Lake Bonneville deposits

Alluvium and colluvium (Quaternary) at surface, covers 22 % of this area

Alluvium and colluvium

Oquirrh Group, including Bridal Veil Limestone (Pennsylvanian to Permian) at surface, covers 7 % of this area

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

Laguna Springs Latite, Tintic Mountain Group, Packard Quartz Latite, and Apex Conglomerate (Late Eocene to Oligocene) at surface, covers 4 % of this area

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

Clayton Peak and Pine Creek stocks (Late Eocene to Oligocene) at surface, covers 3 % of this area

Clayton Peak and Pine Creek stocks.

Precambrian rocks of the Canyon Range (Proterozoic Z) at surface, covers 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).

Older alluvial deposits (Quaternary) at surface, covers 3 % of this area

Older alluvial deposits

Glacial deposits (Quaternary) at surface, covers 3 % of this area

Glacial deposits

Stump and Preuss Sandstones and Twin Creek Limestone (Middle to Late Jurassic) at surface, covers 3 % of this area

Stump and Preuss Sandstones and Twin Creek Limestone.

Thanes Formation, Woodside Shale, and Dinwoody Formation (Early Triassic) at surface, covers 3 % of this area

Thanes Formation, Woodside Shale, and Dinwoody Formation.

Wasatch Formation (Late Paleocene to Early Eocene) at surface, covers 2 % of this area

Wasatch Formation.

Marshes (Holocene) at surface, covers 2 % of this area

Marshes

Mud and salt flats (Holocene) at surface, covers 2 % of this area

Mud and salt flats

Diamond Creek Sandstone and Kirkman Limestone (Early Permian) at surface, covers 2 % of this area

Diamond Creek Sandstone and Kirkman Limestone.

Ankareh Shale (Middle to Late Triassic) at surface, covers 1 % of this area

Ankareh Shale.

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

Nugget Sandstone.

Park City and Phosphoria Formations (Permian) at surface, covers 1 % of this area

Park City and Phosphoria Formations.

Aspen Shale and Kelvin Formation (Early Cretaceous) at surface, covers 1.0 % of this area

Aspen Shale and Kelvin Formation.

Echo Canyon Conglomerate and Henefer Formation (Late Cretaceous) at surface, covers 0.8 % of this area

Echo Canyon Conglomerate and Henefer Formation.

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

Frontier Formation - includes the following members: Upton Ss, Judd Sh, Grass Creek, Dry Hollow, Oyster Ridge Ss, Allen Hollow, Shale Member, Coalville Member, Chalk Creek, Springs Canyon, and Longwall Ss.

Gardison and Lodgepole Limestones (Mississippian) at surface, covers 0.7 % of this area

Gardison and Lodgepole Limestones.

Morgan Formation and Round Valley Limestone (Pennsylvanian) at surface, covers 0.6 % of this area

Morgan Formation and Round Valley Limestone.

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

Great Blue Ls, Humbug Formation, and Deseret Limestone.

Morrison Formation (Late Jurassic) at surface, covers 0.5 % of this area

Morrison Formation.

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

Tintic Quartzite.

Hambug Formation and Deseret Limestone (Mississippian) at surface, covers 0.5 % of this area

Hambug Formation and Deseret Limestone.

Silver City Monzonite, Sunrise Peak Monzonite Porphyry, Swanson Quartz Monzonite (Late Eocene to Oligocene) at surface, covers 0.3 % of this area

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

Ankareh Shale (Middle to Late Triassic) at surface, covers 0.3 % of this area

Ankareh Shale.

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

Bloomington Formation, Maxfield Limestone, and Ophir Formations.

Salt Lake Formation (?) and other Basin & Range valley-filling alluvial, lacustrine, and volcanic materials (Middle Miocene to Late Pliocene) at surface, covers 0.2 % 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.

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

Doughnut 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.

Farmington Canyon Complex and Little Willow Schist and Gneiss (Archean) at surface, covers < 0.1 % of this area

Farmington Canyon Complex and Little Willow Schist and Gneiss (2.6 billion years old).

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.

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

Keetley Volcanics

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

Park City and Phosphoria Formations.

Tintic Quartzite (Early to Middle Cambrian) at surface, covers < 0.1 % of this area

Tintic Quartzite

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.

Rhyolites (Middle to Late Miocene) at surface, covers < 0.1 % of this area

In Northwestern Utah: Dacitic tuff (8.5 my). In Logan-Huntsville Allochthon: rhyolite.

Metamorphic complex of Mt. Nebo (Precambrian) at surface, covers < 0.1 % of this area

Metamorphic complex of Mt. Nebo.