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

Geologic units in Grand county, Utah

Cretaceous (1) sedimentary rocks in southeastern Utah (Cretaceous) at surface, covers 4 % of this area

Lithology: sandstone; shale

Cretaceous (3) sedimentary rocks in Uinta Mountains-Uinta Basin region (Late Cretaceous) at surface, covers 12 % of this area

Lithology: sandstone; shale; coal

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

Lithology: landslide

Cretaceous (2) sedimentary rocks in southeastern Utah (Late Cretaceous) at surface, covers 14 % of this area

Lithology: shale; sandstone; limestone

Tertiary (2) sedimentary rocks in Uinta Mountains-Uinta Basin region (Eocene) at surface, covers 11 % of this area

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

Modern alluvium (Phanerozoic | Cenozoic | Quaternary) at surface, covers < 0.1 % of this area

Includes Piney Creek Alluvium and younger deposits

Lithology: alluvium

Tertiary intrusive rocks in southeastern Utah (Oligocene) at surface, covers 0.4 % of this area

Lithology: diorite; monzodiorite; quartz monzodiorite; quartz diorite; syenite; granite

Tertiary (3) sedimentary rocks in southeastern Utah (Eocene) at surface, covers < 0.1 % of this area

Lithology: sandstone; mudstone; limestone

Moenkopi Fm and Cutler Fm (Phanerozoic | Paleozoic Mesozoic | Permian Triassic) at surface, covers < 0.1 % of this area

Red siltstone and sandstone

Lithology: siltstone; sandstone

Jurassic (2) sedimentary rocks in southeastern Utah (Late Jurassic) at surface, covers 6 % of this area

Lithology: shale; sandstone; conglomerate

Quaternary eolian deposits (Quaternary) at surface, covers 5 % of this area

Lithology: eolian

Quaternary alluvium and colluvium (Quaternary) at surface, covers 5 % of this area

Lithology: alluvium; colluvium

Pennsylvanian and Permian sedimentary rocks in southeastern Utah (Pennsylvanian to Permian) at surface, covers 0.3 % of this area

Lithology: limestone; sandstone

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

Lithology: mudstone; sandstone; siltstone; conglomerate; limestone

Morrison Fm, Summerville Fm, and Entrada Sandstone (Phanerozoic | Mesozoic | Jurassic) at surface, covers < 0.1 % of this area

Summerville Fm: Shale and siltstone

Lithology: mudstone; sandstone

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

Lithology: glacial drift

Glen Canyon Group and Chinle Fm (Phanerozoic | Mesozoic | Triassic Jurassic) at surface, covers < 0.1 % of this area

In southwest, Glen Canyon Group consists of Navajo Sandstone, Kayenta Fm (red siltstone, shale, and sandstone) and Wingate Sandstone; Chinle is red siltstone

Lithology: sandstone; siltstone; shale

Pennsylvanian sedimentary rocks in southeastern Utah (Mississipian to Pennsylvanian) at surface, covers < 0.1 % of this area

Lithology: evaporite; black shale

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

Lithology: alluvium

Tertiary (5) sedimentary rocks in southeastern Utah (Pliocene) at surface, covers 0.1 % of this area

Lithology: conglomerate

Tertiary (1) sedimentary rocks in Uinta Mountains-Unita Basin region (Early to Middle Eocene) at surface, covers 13 % of this area

Lithology: fine-grained mixed clastic; limestone; coal

Older Precambrian metamorphic rocks in southeastern Utah (Precambrian) at surface, covers 0.6 % of this area

Lithology: metamorphic rock; plutonic rock (phaneritic); mudstone

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

Lithology: sandstone; fine-grained mixed clastic; limestone

Cretaceous and Tertiary sedimentary rocks in Uinta Mountains-Uinta Basin region (Late Cretaceous to Paleocene) at surface, covers 0.3 % of this area

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

Jurassic (1) sedimentary rocks in southeastern Utah (Middle to Late Jurassic) at surface, covers 6 % of this area

Lithology: sandstone; mudstone; limestone; evaporite

Triassic and Jurassic sedimentary rocks in southeastern Utah (Early Jurassic) at surface, covers 15 % of this area

Lithology: sandstone; mudstone; limestone

Triassic (1) sedimentary rocks in Salt southeastern Utah (Early Triassic) at surface, covers 1.0 % of this area

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

Dakota Sandstone and Burro Canyon Fm (Phanerozoic | Mesozoic | Cretaceous) at surface, covers < 0.1 % of this area

Sandstone, shale, and conglomerate. In northwest and west-central: Lower Cretaceous. In southwest: Lower and Upper Cretaceous.

Lithology: sandstone; shale; conglomerate