Geologic units in Beaver county, Utah

Alluvium and colluvium (Quaternary) at surface, covers 49 % of this area

Alluvium and colluvium

Miocene volcanic rocks, undivided (Late Oligocene to Middle Miocene) at surface, covers 10 % 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.

Isom Fm, Needles Range Fm, Escalante Desert Fm, Sawtooth Peak Fm, and Tunnel Springs Tuff (Late Eocene to Oligocene) at surface, covers 9 % 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.

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

Older alluvial deposits

Tertiary volcanic rocks, undivided (Tertiary) at surface, covers 5 % of this area

Tertiary volcanic rocks, undivided.

Quartz Monzonite and granite (Oligocene to Miocene) at surface, covers 3 % of this area

Quartz Monzonite (in Cedar City area) and monzonite and granite (in Marysvale area).

Notch Peak, Orr, Lamb, Weeks, and Wah Wah Summit Formations (Middle Cambrian to Early Ordovician) at surface, covers 2 % of this area

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

Sevier River Formation (Miocene to Pliocene) at surface, covers 1 % of this area

Sevier River Formation.

Basalts (Early to Middle Miocene) at surface, covers 1 % of this area

In Southwestern Utah: In Cedar City area: Page Ranch Fm, Rencher Fm and Quichapa Group (24my). In Marysvale area: Joe Lott Tuff, Mt. Belknap Volcanics, Osiris Tuff and Mt. Dutton Formation.

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

Basalts

Lake Bonneville deposits (Quaternary) at surface, covers 1.0 % of this area

Lake Bonneville deposits

Prospect Mountain Quartzite (Early Cambrian) at surface, covers 1.0 % of this area

Prospect Mountain Quartzite (3,500 feet thick).

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.

Rhyolites (Middle to Late Miocene) at surface, covers 0.9 % of this area

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

Pilot Shale, Guilmette Formation, and Simonson and Sevy Dolomites (Devonian to Mississippian) at surface, covers 0.9 % of this area

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

Intrusions, chiefly granitic, of various dates (Late Eocene to Early Miocene) at surface, covers 0.8 % of this area

Intrusions, chiefly granitic, of various dates.

Ely Springs Dm, Eureka Qtz, Crystal Peak Dm, Watson Ranch Qzt, and the Pogonip Group (Ordovician) at surface, covers 0.6 % 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).

Landslides (Quaternary) at surface, covers 0.5 % of this area

Landslides

Joana Limestone (Mississippian) at surface, covers 0.5 % of this area

Joana Limestone.

Laketown Dolomite (Silurian) at surface, covers 0.4 % of this area

Laketown Dolomite.

McCoy Creek and Sheeprock Groups (Precambrian) at surface, covers 0.4 % of this area

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

Navajo Sandstone, Kayenta and Moenave Formations (Early to Middle Jurassic) at surface, covers 0.3 % of this area

Navajo Sandstone, Kayenta and Moenave Formations. Includes Zion National Park (Navajo Ss).

Navajo Sandstone (Star Range and Blue Mountain) (Early Jurassic) at surface, covers 0.3 % of this area

Navajo Sandstone (Star Range and Blue Mountain).

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).

Rhyolites (Quaternary) at surface, covers 0.2 % of this area

Rhyolites

Oquirrh Group (Pennsylvanian to Permian) at surface, covers 0.2 % 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 0.2 % of this area

Arcturus Formation.

Gerster Limestone, Plympton Formation and Kaibab Limestone (Permian) at surface, covers 0.2 % of this area

Gerster Limestone, Plympton Formation and Kaibab Limestone.

Kaibab Limestone and Toroweap Formation (Early Permian) at surface, covers 0.2 % of this area

Kaibab Limestone and Toroweap Formation.

Moenkopi and Thaynes Formations (Early Triassic) at surface, covers 0.2 % of this area

Moenkopi (in Blue Mountain) and Thaynes (north of Confusion Range) Formations.

Moenkopi Formation (Early Triassic) at surface, covers 0.1 % of this area

Moenkopi Formation.

Coconino Sandstone, Supai Group, and Pakoon Formation (Early Permian) at surface, covers 0.1 % of this area

Coconino Sandstone, Supai Group, and Pakoon Formation.

Callville Limestone (Pennsylvanian) at surface, covers < 0.1 % of this area

Callville Limestone.

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

Rhyolites

Redwall Limestone (Mississippian) at surface, covers < 0.1 % of this area

Redwall Limestone (chert).

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

Basalts

Isom Fm, Needles Range Fm, and Bullion Canyon Volcanics (Late Eocene to Oligocene) at surface, covers < 0.1 % of this area

In Cedar City area: Isom Fm and Needles Range Fm (29 my). In Marysvale area: Bullion Canyon Volcanics.

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

Chinle Formation.

Nopah and Bonanza King Formations, Muav Limestone, and Pioche Shale (Middle Cambrian) at surface, covers < 0.1 % of this area

Nopah and Bonanza King Formations, Muav Limestone, and Pioche Shale

Mud and salt flats (Holocene) at surface, covers < 0.1 % of this area

Mud and salt flats

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.

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

Red conglomerate

Alluvial materials, Axtell and Harkers Formations (Pliocene to Quaternary) at surface, covers < 0.1 % of this area

Alluvial materials, Axtell and Harkers Formations