Geologic units in Garfield county, Utah

Additional scientific data in this geographic area

Glen Canyon Group (Early Jurassic) at surface, covers 16 % of this area

Glen Canyon Group (Navajo Ss, Kayenta Fm, and Wingate Ss). Includes Rainbow Bridge.

Alluvium and colluvium (Quaternary) at surface, covers 13 % of this area

Alluvium and colluvium

Miocene volcanic rocks, undivided (Late Oligocene to Middle Miocene) at surface, covers 12 % 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.

Bluff Ss, Summerville Fm, Curtis Fm, Entrada Ss, and Carmel Formation (Middle to Late Jurassic) at surface, covers 6 % of this area

Bluff Ss, Summerville Fm, Curtis Fm, Entrada Ss, and Carmel Formation. Includes Arches National Park.

Iron Springs Formation of Cedar City Area (Wahweap Ss and Straight Cliffs Fm) (Late Cretaceous) at surface, covers 6 % of this area

Iron Springs Formation of Cedar City Area (Wahweap Ss and Straight Cliffs Fm).

Mancos Shale (Late Cretaceous) at surface, covers 6 % of this area

Mancos Shale (Masuk Shale Mbr, Emery Sandstone Mbr, Blue Gate Shale Mbr, Ferron Sandstone Mbr, and Tununk Shale Mbr).

Claron Formation (Late Paleocene to Early Oligocene) at surface, covers 6 % of this area

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

Moenkopi Formation (Early Triassic) at surface, covers 4 % of this area

Moenkopi Formation.

Chinle Shale and Shinarump Conglomerate Member (Late Triassic) at surface, covers 4 % of this area

Chinle Shale and Shinarump Conglomerate Member.

Morrison Formation (Brushy Basin and Salt Wash Members) (Late Jurassic) at surface, covers 3 % of this area

Morrison Formation (Brushy Basin and Salt Wash Members).

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

Eolian deposits

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

Older alluvial deposits

Isom Fm, Needles Range Fm, and Bullion Canyon Volcanics (Late Eocene to Oligocene) at surface, covers 2 % of this area

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

Cutler Group (Pennsylvanian to Early Permian) at surface, covers 2 % of this area

Cutler Group (White Rim Ss, De Chelly Ss, Organ Rock Shale, Cedar Mesa Ss, Halgaito Fm, and Elephant Canyon Fm). Includes Natural Bridges National Monument.

Dakota Ss and Cedar Mtn. or Burro Canyon Formations (Cretaceous) at surface, covers 2 % of this area

Dakota Ss and Cedar Mtn or Burro Canyon Formations.

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

Basalts

Iron Springs Formation of Cedar City Area (Kaiparowits Fm) (Late Cretaceous) at surface, covers 1 % of this area

Iron Springs Formation of Cedar City Area (Kaiparowits Fm).

Tertiary volcanic rocks, undivided (Tertiary) at surface, covers 1 % of this area

Tertiary volcanic rocks, undivided.

Alluvial materials, Axtell and Harkers Formations (Pliocene to Quaternary) at surface, covers 1 % of this area

Alluvial materials, Axtell and Harkers Formations

Laccolithic intrusions mostly diorite porphyry (Oligocene) at surface, covers 1 % of this area

Laccolithic intrusions mostly diorite porphyry (24-28 my).

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

Basalts

Iron Springs Formation of Cedar City Area (Tropic Shale and Dakota Sandstone) (Late Cretaceous) at surface, covers 0.9 % of this area

Iron Springs Formation of Cedar City Area (Tropic Shale and Dakota Sandstone).

Landslides (Quaternary) at surface, covers 0.9 % of this area

Landslides

Mesaverde Group (Late Cretaceous) at surface, covers 0.6 % of this area

Mesaverde Group (Price River Fm, Castlegate Ss, Blackhawk Fm (coal), and Star Point Ss).

Canaan Peak Formation (Late Cretaceous to Paleocene) at surface, covers 0.5 % of this area

Canaan Peak Formation.

Kaibab Limestone (Early Permian) at surface, covers 0.4 % of this area

Kaibab Limestone.

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

Glacial deposits

Entrada and Carmel Formations (Middle Jurassic) at surface, covers 0.3 % of this area

Entrada and Carmel Formations (Arapien Shale at Marysvale).

Basalts (Early to Middle Miocene) at surface, covers 0.2 % 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.

Muddy Creek Formation (Miocene) at surface, covers 0.2 % of this area

Muddy Creek Formation (in Cedar City area).

Sevier River Formation (Miocene to Pliocene) at surface, covers 0.2 % of this area

Sevier River Formation.

Rico Formation (Pennsylvanian to Permian) at surface, covers 0.1 % of this area

Rico Formation.

Hermosa Group and Molas Formation (Mississipian to Pennsylvanian) at surface, covers 0.1 % of this area

Hermosa Group (Honaker Trail Fm, Paradox Fm (oil, salt, potash), Pinkerton Trail Fm) and Molas 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.