Geologic units in Juab county, Utah

Additional scientific data in this geographic area

Alluvium and colluvium (Quaternary) at surface, covers 31 % of this area

Alluvium and colluvium

Lake Bonneville deposits (Quaternary) at surface, covers 24 % of this area

Lake Bonneville deposits

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

Rhyolites (Middle to Late Miocene) at surface, covers 3 % of this area

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

Alluvial materials, Axtell and Harkers Formations (Pliocene to Quaternary) at surface, covers 3 % of this area

Alluvial materials, Axtell and Harkers Formations

Laguna Springs Latite, Tintic Mountain Group, Packard Quartz Latite, and Apex Conglomerate (Late Eocene to Oligocene) at surface, covers 3 % of this area

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

Mud and salt flats (Holocene) at surface, covers 3 % of this area

Mud and salt flats

Indianola Formation (Cretaceous) at surface, covers 2 % of this area

Indianola Formation.

Isom Fm, Needles Range Fm, Escalante Desert Fm, Sawtooth Peak Fm, and Tunnel Springs Tuff (Late Eocene to Oligocene) at surface, covers 2 % of this area

Isom Fm (tuff), Needles Range Fm (ash-flow tuff), Escalante Desert Fm (ash-flow tuff), Sawtooth Peak Fm (ash-flow tuff), and Tunnel Springs Tuff.

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

Eolian deposits

McCoy Creek and Sheeprock Groups (Precambrian) at surface, covers 2 % of this area

McCoy Creek and Sheeprock Groups (10,000+ feet thick).

Intrusions, chiefly granitic, of various dates (Late Eocene to Early Miocene) at surface, covers 2 % of this area

Intrusions, chiefly granitic, of various dates.

Pilot Shale, Guilmette Formation, and Simonson and Sevy Dolomites (Devonian to Mississippian) at surface, covers 2 % of this area

Pilot Shale, Guilmette Formation, and Simonson and Sevy Dolomites.

Arapien Shale (Middle Jurassic) at surface, covers 1 % of this area

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

Notch Peak, Orr, Lamb, Weeks, and Wah Wah Summit Formations (Middle Cambrian to Early Ordovician) at surface, covers 1 % of this area

Notch Peak, Orr, Lamb, Weeks, and Wah Wah Summit Formations.

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

Flagstaff Limestone.

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

Basalts

Ely Springs Dm, Eureka Qtz, Crystal Peak Dm, Watson Ranch Qzt, and the Pogonip Group (Ordovician) at surface, covers 1 % of this area

Ely Springs Dm, Eureka Qtz, Crystal Peak Dm, Watson Ranch Qzt, and the Pogonip Group (Lehman Formation, Kanosh Shale, Juab, Wah Wah, Fillmore, and House Limestones).

Oquirrh Group, including Bridal Veil Limestone (Pennsylvanian to Permian) at surface, covers 1.0 % of this area

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

North Horn Formation (Late Cretaceous to Eocene) at surface, covers 0.9 % of this area

North Horn Formation.

Great Blue Ls, Humbug Formation, and Deseret Limestone (Mississippian) at surface, covers 0.9 % of this area

Great Blue Ls, Humbug Formation, and Deseret Limestone.

Trippe Ls, Marjum/Pierson Cove Fms, Wheeler Shale, Swasey Ls, Whirlwind Fm, Dome Ls, Chisholm Fm, Howell Fm, and Pioche Fm (Middle Cambrian) at surface, covers 0.9 % of this area

Trippe Ls, Marjum/Pierson Cove Fms, Wheeler Shale, Swasey Ls, Whirlwind Fm, Dome Ls, Chisholm Fm, Howell Fm, and Pioche Fm.

Duchesne River, Uinta and Bridger Formations (Late Eocene to Early Oligocene) at surface, covers 0.8 % of this area

Duchesne River, Uinta and Bridger Formations

Marshes (Holocene) at surface, covers 0.7 % of this area

Marshes

Prospect Mountain Quartzite (Early Cambrian) at surface, covers 0.6 % of this area

Prospect Mountain Quartzite (3,500 feet thick).

Green River Formation (Eocene) at surface, covers 0.6 % of this area

Green River Formation.

Laketown Dolomite (Silurian) at surface, covers 0.5 % of this area

Laketown Dolomite.

Gerster Limestone, Plympton Formation and Kaibab Limestone (Permian) at surface, covers 0.4 % of this area

Gerster Limestone, Plympton Formation and Kaibab Limestone.

Glacial deposits (Quaternary) at surface, covers 0.4 % of this area

Glacial deposits

Price River Formation (Late Cretaceous) at surface, covers 0.3 % of this area

Price River Formation.

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

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

Oquirrh Group (Pennsylvanian to Permian) at surface, covers 0.3 % of this area

Oquirrh Group (10,000+ feet thick) of Cedar Mountains and vicinity, is equivalent, in part to Arcturus Formation and Ely Limestone elsewhere

Arcturus Formation (Early Permian) at surface, covers 0.3 % of this area

Arcturus Formation.

Basalts (Pliocene) at surface, covers 0.3 % of this area

Basalts

Silver City Monzonite, Sunrise Peak Monzonite Porphyry, Swanson Quartz Monzonite (Late Eocene to Oligocene) at surface, covers 0.2 % of this area

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

Ochre Mountain Limestone and Woodman Formation (Mississippian) at surface, covers 0.2 % of this area

Ochre Mountain Limestone (Great Blue equivalent) and Woodman Formation (Deseret Humbug equivalent).

Gardison Limestone and Fitchville Formation (Late Devonian to Mississippian) at surface, covers 0.2 % of this area

Gardison Limestone and Fitchville Formation.

Ajax Dolomite and Opex Formation (Middle Cambrian to Early Ordovician) at surface, covers 0.2 % of this area

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

Tintic Quartzite (Early to Middle Cambrian) at surface, covers 0.2 % of this area

Tintic Quartzite.

Joana Limestone (Mississippian) at surface, covers 0.2 % of this area

Joana Limestone.

Pinyon Peak Limestone and Victoria Formation (Devonian) at surface, covers 0.1 % of this area

Pinyon Peak Limestone and Victoria Formation.

Diamond Creek Sandstone and Kirkman Limestone (Early Permian) at surface, covers 0.1 % of this area

Diamond Creek Sandstone and Kirkman Limestone.

Metamorphic rocks (Precambrian) at surface, covers 0.1 % of this area

Metamorphic rocks.

Precambrian rocks of the Canyon Range (Proterozoic Z) at surface, covers 0.1 % 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).

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

Park City and Phosphoria Formations.

Salt Lake Formation and other Basin & Range valley-filling alluvial, lacustrine, and volcanic materials (Middle Miocene to Late Pliocene) at surface, covers < 0.1 % of this area

Salt Lake Formation and other Basin & Range valley-filling alluvial, lacustrine, and volcanic materials. Valley fill is more than 8,000 feet thick in places and includes salt masses under the Sevier Desert.

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

Landslides

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

Ankareh Shale.

Fish Haven Dolomite and Opohonga Limestone (Ordovician) at surface, covers < 0.1 % 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.

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

Older alluvial deposits

Manning Canyon Shale (Mississippian) at surface, covers < 0.1 % of this area

Manning Canyon Shale.

Chinle Formation (Late Triassic) at surface, covers < 0.1 % of this area

Chinle 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.

Red conglomerate (Late Cretaceous to Eocene) at surface, covers < 0.1 % of this area

Red conglomerate

Alluvium, undifferentiated (Holocene and Pleistocene) at surface, covers < 0.1 % of this area

Unit is present in all counties. Some counties divided the alluvium into younger and older units, and some did not. For those that did not, or used other generalized terms for Quaternary rocks, the unit Qal has been used for the general undivided alluvium. Additionally, when polygons have been edited and changed to alluvium, Qal was used as the general value; hence it now is present in all counties. Qya-Younger alluvium: Map unit is used in Churchill, Elko, Esmeralda, Eureka, Humboldt, Lander, and Lincoln Counties where geologic information suggests better-defined younger versus older alluvium. It is mostly interchangeable with Qal, except that it implies some specifically younger Quaternary deposits.

Carbonate Shelf Sequence - Limestone and minor dolomite (Upper and Middle Devonian) at surface, covers < 0.1 % of this area

Includes generally cliff-forming, thin- to thick-bedded limestone. These rocks are mainly shallow water subtidal, intertidal, and supratidal deposits formed on a broad inner carbonate shelf (Stewart, 1980). The Devils Gate Limestone and Guilmette Formation in northern Nevada are the principal units, and the Sultan Limestone is included from the southern part of the State. Unit is overlain (usually disconformably) by the Pilot Shale of unit MDcl except in southernmost Nevada where it is overlain by Mississippian carbonate (Mc). It depositionally overlies Middle and Lower Devonian unit Dcd. In a few places, such as southern Nevada and parts of Eureka County, regional mapping did not distinguish the Upper and Middle Devonian section from the Lower Devonian section, and all of the Devonian is included in unit Dc. Rocks mapped as the Simonson Dolomite would fit into this depositional sequence (sequences 9 and 10 of Cook and Corboy, 2004), but they are not differentiated from the underlying dolomites in White Pine or Elko Counties, so they are all included in unit Dcd here, not unit Dc. This unit crops out in Clark, Elko, Eureka, Lander, Lincoln, Nye, and White Pine Counties.