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Mineral Resources > Online Spatial Data > Geology > by state > Utah Geology

Geologic units in Millard county, Utah

[Additional scientific data in this geographic area]

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

ALLUVIAL DEPOSITS-Locally includes beach and sand dune deposits

Lithology: alluvium; mass wasting; dune sand; lake or marine deposit (non-glacial)

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

Lithology: basalt; rhyolite

Triassic (1) sedimentary rocks in Salt western Utah (Early Triassic) at surface, covers < 0.1 % of this area

Lithology: siltstone; limestone

Quaternary eolian deposits (Quaternary) at surface, covers 0.6 % of this area

Lithology: eolian

Middle Cambrian shale and carbonate rocks in southwestern Utah (Middle Cambrian) at surface, covers < 0.1 % of this area

Lithology: dolostone (dolomite); argillite; limestone

Upper Cambrian carbonate rocks in central Utah (Middle Cambrian to Early Ordovician) at surface, covers 0.3 % of this area

Lithology: dolostone (dolomite); limestone; shale; chert

Tertiary intrusive rocks in central Utah (Late Eocene to Oligocene) at surface, covers < 0.1 % of this area

Lithology: granodiorite; monzonite; quartz monzonite; monzodiorite; granite; diorite; quartz diorite; quartz monzodiorite

Middle Cambrian shale and carbonate rocks in central Utah (Middle Cambrian) at surface, covers 0.5 % of this area

Lithology: dolostone (dolomite); limestone; shale

Tertiary volcanic rocks, undivided (Tertiary) at surface, covers 0.2 % of this area

Lithology: volcanic rock (aphanitic)

Triassic and Jurassic sedimentary rocks in central Utah (Early Jurassic) at surface, covers 0.7 % of this area

Lithology: sandstone

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

Lithology: alluvium; colluvium

Triassic (2) sedimentary rocks in central Utah (Middle to Late Triassic) at surface, covers < 0.1 % of this area

Lithology: mudstone; siltstone; sandstone; conglomerate; evaporite

Miocene basalts (Early to Middle Miocene) at surface, covers < 0.1 % of this area

Lithology: basalt

Cretaceous (2) sedimentary rocks in central Utah (Cretaceous) at surface, covers < 0.1 % of this area

Lithology: sandstone; mudstone; conglomerate; coal

Tertiary (4) sedimentary rocks in central Utah (Middle Miocene to Late Pliocene) at surface, covers 1.0 % of this area

Lithology: medium-grained mixed clastic; alluvium; limestone; pyroclastic

Ordovician sedimentary rocks in western Utah (Ordovician) at surface, covers 2 % of this area

Lithology: limestone; fine-grained mixed clastic; sandstone; dolostone (dolomite)

Younger Precambrian metamorphic rocks in central Utah (Proterozoic Z) at surface, covers 0.5 % of this area

Lithology: sandstone; conglomerate; limestone

Permian (1) sedimentary rocks in southwestern Utah (Early Permian) at surface, covers < 0.1 % of this area

Lithology: sandstone; dolostone (dolomite); fine-grained mixed clastic

Permian (2) sedimentary rocks in central Utah (Permian) at surface, covers < 0.1 % of this area

Lithology: limestone; mudstone; sandstone; phosphorite; dolostone (dolomite)

Younger Precambrian metamorphic rocks in western Utah (Precambrian) at surface, covers 0.3 % of this area

Lithology: conglomerate; metamorphic rock

Cretaceous (3) sedimentary rocks in central Utah (Late Cretaceous) at surface, covers 0.3 % of this area

Lithology: sandstone; mudstone; conglomerate

Triassic (1) sedimentary rocks in Salt central Utah (Early Triassic) at surface, covers < 0.1 % of this area

Lithology: siltstone; mudstone; limestone; sandstone

Devonian sedimentary rocks in western Utah (Devonian to Mississippian) at surface, covers 3 % of this area

Lithology: dolostone (dolomite); limestone; siltstone; mudstone

Tertiary (4) sedimentary rocks in western Utah (Middle Miocene to Late Pliocene) at surface, covers 0.5 % of this area

Lithology: coarse-grained mixed clastic; alluvium; pyroclastic; basalt; evaporite

Upper Cambrian carbonate rocks in western Utah (Middle Cambrian to Early Ordovician) at surface, covers 2 % of this area

Lithology: limestone; dolostone (dolomite); shale

Miocene volcanic rocks (Late Oligocene to Middle Miocene) at surface, covers 0.5 % of this area

Lithology: ash-flow tuff; basalt

Triassic (2) sedimentary rocks in southwestern Utah (Late Triassic) at surface, covers < 0.1 % of this area

Lithology: mudstone; conglomerate; siltstone

Middle Cambrian shale and carbonate rocks in western Utah (Middle Cambrian) at surface, covers 2 % of this area

Lithology: limestone; shale; dolostone (dolomite); argillite

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

Lithology: rhyolite

Mississippian (1) carbonate rocks in southwestern Utah (Mississippian) at surface, covers < 0.1 % of this area

Lithology: limestone; dolostone (dolomite); chert

Quaternary marshes (Holocene) at surface, covers 0.6 % of this area

Lithology: biogenic sediment

Older Precambrian metamorphic rocks in western Utah (Precambrian) at surface, covers < 0.1 % of this area

Lithology: metamorphic rock

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

Lithology: playa

Tertiary (3) sedimentary rocks in central Utah (Late Eocene to Early Oligocene) at surface, covers < 0.1 % of this area

Lithology: sandstone; mudstone; siltstone; conglomerate

Pennsylvanian and Permian sedimentary rocks in southwestern Utah (Pennsylvanian) at surface, covers 0.1 % of this area

Lithology: dolostone (dolomite); sandstone

Tertiary (2) sedimentary rocks in central Utah (Eocene) at surface, covers < 0.1 % of this area

Lithology: shale; limestone; oil shale; fine-grained mixed clastic; tuff

Silurian carbonate rocks in central Utah (Late Ordovician to Silurian) at surface, covers < 0.1 % of this area

Lithology: dolostone (dolomite)

Oligocene volcanic rocks (Late Eocene to Oligocene) at surface, covers 1 % of this area

Lithology: dacite; rhyolite; andesite; basalt

Cretaceous (3) sedimentary rocks in southwestern Utah (Late Cretaceous) at surface, covers 0.2 % of this area

Lithology: fine-grained mixed clastic; siltstone

Permian (2) sedimentary rocks in western Utah (Permian) at surface, covers 0.7 % of this area

Lithology: carbonate; fine-grained mixed clastic; chert

Permian (1) sedimentary rocks in western Utah (Early Permian) at surface, covers 1 % of this area

Lithology: sandstone; carbonate; fine-grained mixed clastic; evaporite

Quaternary Lake Bonneville deposits (Quaternary) at surface, covers 17 % of this area

Lithology: clay or mud; sand; gravel; silt

Devonian sedimentary rocks in central Utah (Devonian) at surface, covers < 0.1 % of this area

Lithology: limestone; sandstone; dolostone (dolomite)

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

Lithology: mud flat; playa

Mississippian (1) carbonate rocks in western Utah (Mississippian) at surface, covers 0.4 % of this area

Lithology: limestone

Cambrian quartzite in western Utah (Early Cambrian) at surface, covers 1 % of this area

Lithology: arenite; conglomerate

Mississippian (2) sedimentary rocks in western Utah (Mississippian) at surface, covers 0.4 % of this area

Lithology: limestone; sandstone; dolostone (dolomite); shale

Tertiary (5) sedimentary rocks in southwestern Utah (Miocene to Pliocene) at surface, covers < 0.1 % of this area

Lithology: sandstone; conglomerate

Cambrian quartzite in southwestern Utah (Early to Middle Cambrian) at surface, covers < 0.1 % of this area

Lithology: arenite

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

Lithology: rhyolite; dacite

Pennsylvanian and Permian sedimentary rocks in western Utah (Pennsylvanian to Permian) at surface, covers 1 % of this area

Lithology: sandstone; limestone

Cretaceous and Tertiary sedimentary rocks in central Utah (Late Cretaceous to Eocene) at surface, covers 1 % of this area

Lithology: fine-grained mixed clastic; sandstone; conglomerate; limestone

Ordovician sedimentary rocks in central Utah (Ordovician) at surface, covers 0.1 % of this area

Lithology: limestone; dolostone (dolomite)

Quaternary basalts (Quaternary) at surface, covers 4 % of this area

Lithology: basalt; rhyolite

Permian (2) sedimentary rocks in southwestern Utah (Early Permian) at surface, covers 0.1 % of this area

Lithology: limestone; evaporite; chert

Pliocene and Quaternary alluvial material (Pliocene to Quaternary) at surface, covers < 0.1 % of this area

Lithology: alluvium

Tertiary (1) sedimentary rocks in central Utah (Late Paleocene to Early Eocene) at surface, covers 0.4 % of this area

Lithology: limestone; mudstone; fine-grained mixed clastic; dolostone (dolomite)

Jurassic intrusive rocks in western Utah (Jurassic) at surface, covers 0.1 % of this area

Lithology: granodiorite; monzodiorite; monzonite; quartz monzonite; diorite; granite; aplite

Triassic (1) sedimentary rocks in Salt southwestern Utah (Early Triassic) at surface, covers 0.1 % of this area

Lithology: mudstone; siltstone; limestone; sandstone; conglomerate; evaporite

Silurian carbonate rocks in western Utah (Silurian) at surface, covers 0.8 % of this area

Lithology: dolostone (dolomite); chert

Cambrian quartzite in central Utah (Early to Middle Cambrian) at surface, covers 0.8 % of this area

Lithology: arenite; conglomerate

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

Lithology: alluvium

Tertiary intrusive rocks in southwestern Utah (Oligocene to Miocene) at surface, covers < 0.1 % of this area

Lithology: quartz monzonite; granite; monzonite

Devonian sedimentary rocks in southewestern Utah (Devonian) at surface, covers < 0.1 % of this area

Lithology: dolostone (dolomite); limestone; sandstone; shale