Geologic units in Piute county, Utah

Miocene volcanic rocks, undivided (Late Oligocene to Middle Miocene) at surface, covers 46 % 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.

Alluvium and colluvium (Quaternary) at surface, covers 15 % of this area

Alluvium and colluvium

Isom Fm, Needles Range Fm, and Bullion Canyon Volcanics (Late Eocene to Oligocene) at surface, covers 13 % of this area

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

Older alluvial deposits (Quaternary) at surface, covers 10 % of this area

Older alluvial deposits

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

Landslides

Basalts (Pliocene) at surface, covers 3 % of this area

Basalts

Rhyolites (Pliocene) at surface, covers 2 % of this area

Rhyolites

Basalts (Early to Middle Miocene) at surface, covers 2 % 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.

Sevier River Formation (Miocene to Pliocene) at surface, covers 2 % of this area

Sevier River Formation.

Navajo Sandstone, Kayenta and Moenave Formations (Early to Middle Jurassic) at surface, covers 0.9 % of this area

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

Quartz Monzonite and granite (Oligocene to Miocene) at surface, covers 0.7 % of this area

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

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

Glacial deposits

Alluvial materials, Axtell and Harkers Formations (Pliocene to Quaternary) at surface, covers 0.5 % of this area

Alluvial materials, Axtell and Harkers Formations

Claron Formation (Late Paleocene to Early Oligocene) at surface, covers 0.2 % of this area

Claron Formation. Includes Bryce Canyon/Cedar Breaks Nat. Park.

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

Eolian deposits

Muddy Creek Formation (Miocene) at surface, covers < 0.1 % of this area

Muddy Creek Formation (in Cedar City area).

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

Moenkopi Formation.

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

Rhyolites

Kaibab Limestone and Toroweap Formation (Early Permian) at surface, covers < 0.1 % of this area

Kaibab Limestone and Toroweap Formation.

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.