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

Geologic units in Rich county, Utah

[Additional scientific data in this geographic area]

Triassic (1) sedimentary rocks in Logan-Huntsville Allochthon (Early Triassic) at surface, covers 0.3 % of this area

Lithology: limestone; siltstone; mudstone

Devonian sedimentary rocks in Salt Lake City-Coalville-Randolph region (Devonian) at surface, covers 0.3 % of this area

Lithology: dolostone (dolomite); sandstone

Permian (2) sedimentary rocks in Salt Lake City-Coalville-Randolph region (Permian) at surface, covers 0.4 % of this area

Lithology: limestone; siltstone; sandstone; shale; phosphorite

Pennsylvanian and Permian sedimentary rocks in Logan-Huntsville Allochthon (Pennsylvanian to Permian) at surface, covers 0.1 % of this area

Lithology: sandstone; carbonate

Wasatch Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area

WASATCH FORMATION -- in Thrust belt: Main body--Variegated red to gray, brown, and gray mudstone and sandstone; conglomeratic lenses; in southwest Wyoming--Drab to variegated claystone and siltstone, carbonaceous shale and coal, buff sandstone, arkose, and conglomerate. In northwestern part of Green River Basin is thick arkosic light-yellowish-tan sandstone intertonguing with pale-green to gray claystone and shale; in east Wyoming--Drab sandstone and drab to variegated claystone; numerous coal beds in lower part.

Lithology: mudstone; sandstone; conglomerate; coal

Middle Cambrian shale and carbonate rocks in Logan-Huntsville Allochthon (Middle Cambrian) at surface, covers 1 % of this area

Lithology: dolostone (dolomite); shale; limestone

Tertiary (4) sedimentary rocks in Logan-Huntsville Allochthon (Middle Miocene to Late Pliocene) at surface, covers < 0.1 % of this area

Lithology: mudstone; sandstone

Mississippian (1) carbonate rocks in Salt Lake City-Coalville-Randolph region (Mississippian) at surface, covers 0.4 % of this area

Lithology: limestone

Devonian sedimentary rocks in Logan-Huntsville Allochthon (Devonian) at surface, covers 0.3 % of this area

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

Upper Cambrian carbonate rocks in Logan-Huntsville Allochthon (Middle Cambrian to Early Ordovician) at surface, covers 0.8 % of this area

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

Tertiary (1) sedimentary rocks in Salt Lake City-Coalville-Randolph region (Late Paleocene to Early Eocene) at surface, covers 15 % of this area

Lithology: mudstone; conglomerate; limestone

Ordovician sedimentary rocks in Logan-Huntsville Allochthon (Ordovician) at surface, covers 1 % of this area

Lithology: limestone; arenite; dolostone (dolomite); chert; conglomerate

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

Lithology: alluvium; colluvium

Salt Lake Formation (Phanerozoic | Cenozoic | Tertiary | Miocene Pliocene) at surface, covers < 0.1 % of this area

SALT LAKE FORMATION--White, gray, and green limy tuff, siltstone, sandstone, and conglomerate.

Lithology: fine-grained mixed clastic; medium-grained mixed clastic; mixed clastic/carbonate; mixed clastic/volcanic

Triassic and Jurassic sedimentary rocks in Salt Lake City-Coalville-Randolph region (Early Jurassic) at surface, covers 1 % of this area

Lithology: sandstone

Silurian carbonate rocks in Logan-Huntsville Allochthon (Silurian) at surface, covers 0.7 % of this area

Lithology: dolostone (dolomite)

Permian (2) sedimentary rocks in Logan-Huntsville Allochthon (Permian) at surface, covers < 0.1 % of this area

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

Mississippian (2) sedimentary rocks in Logan-Huntsville Allochthon (Mississippian) at surface, covers < 0.1 % of this area

Lithology: carbonate; sandstone; mudstone; phosphorite

Fowkes Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area

FOWKES FORMATION--Light-colored tuffaceous sandstone and siltstone, locally conglomeratic. Locally designated by some as Norwood Tuff.

Lithology: fine-grained mixed clastic; medium-grained mixed clastic; mixed clastic/volcanic

Sandstone, conglomerate, siltstone, tuff, claystone, limestone, and diatomite; Pliocene tuffaceous alluvial and lacustrine deposits; Snake River Plain and vicinity, southeastern Idaho (Pliocene ) at surface, covers < 0.1 % of this area

Pliocene stream and lake deposits; may be due to volcanic and block-faulting events.

Lithology: sandstone; conglomerate; siltstone; tuff; claystone; shale; limestone

Evanston Formation (Phanerozoic | Mesozoic Cenozoic | Cretaceous-Late Tertiary | Paleocene) at surface, covers < 0.1 % of this area

EVANSTON FORMATION--Gray siltstone, sparse red sandstone, and lignite beds.

Lithology: siltstone; sandstone; coal

Pennsylvanian and Permian sedimentary rocks in Salt Lake City-Coalville-Randolph region (Pennsylvanian to Permian) at surface, covers 0.6 % of this area

Lithology: orthoquartzite; limestone

Cretaceous and Tertiary sedimentary rocks in Logan-Huntsville Allochthon (Late Cretaceous to Paleocene) at surface, covers < 0.1 % of this area

Lithology: sandstone; mudstone; coal

Tertiary (2) sedimentary rocks in Salt Lake City-Coalville-Randolph region (Eocene) at surface, covers 0.4 % of this area

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

Mississippian (1) carbonate rocks in Logan-Huntsville Allochthon (Mississippian) at surface, covers 0.1 % of this area

Lithology: limestone

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

Lithology: alluvium

Cambrian quartzite in northwestern Utah (Cambrian?) at surface, covers < 0.1 % of this area

Lithology: schist; quartzite

Jurassic (1) sedimentary rocks in Salt Lake City-Coalville-Randolph region (Middle to Late Jurassic) at surface, covers 1 % of this area

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

Dolostone, limestone, arenite, chert, and conglomerate; Ordovician marine continental-shelf deposits; southeastern Idaho (Ordovician) at surface, covers < 0.1 % of this area

Ordovician marine dolomite, quartzite, and limestone; subdivisions are (Ou and Ol).

Lithology: dolostone (dolomite); limestone; arenite; chert; conglomerate

Open Water (Holocene) at surface, covers < 0.1 % of this area

Lakes and streams

Lithology: water

Nugget Sandstone (Phanerozoic | Mesozoic | Triassic(?) Jurassic(?) ) at surface, covers < 0.1 % of this area

NUGGET SANDSTONE--Thrust Belt: Buff to pink crossbedded well-sized and well-sorted quartz sandstone and quartzite; locally has oil and copper-silver-zinc mineralization. North Wyoming: Gray to dull-red, crossbedded quartz sandstone.

Lithology: sandstone

Triassic (2) sedimentary rocks in Logan-Huntsville Allochthon (Middle to Late Triassic) at surface, covers 0.1 % of this area

Lithology: shale; siltstone; conglomerate

Cambrian quartzite in Logan-Huntsville Allochthon (Early to Middle Cambrian) at surface, covers 2 % of this area

Lithology: arenite; conglomerate; siltstone; mudstone

Limestone, arenite, shale, dolostone, and siltstone; Upper Proterozoic to Cambrian marine continental-shelf deposits; southeastern Idaho (Cambrian) at surface, covers < 0.1 % of this area

Cambrian marine dolomite, limestone, claystone, and quartzite; grades into Precambrian.

Lithology: limestone; arenite; shale; dolostone (dolomite); siltstone

Tertiary (1) sedimentary rocks in Logan-Huntsville Allochthon (Late Cretaceous to Early Eocene) at surface, covers 48 % of this area

Lithology: conglomerate; medium-grained mixed clastic

Mississippian (2) sedimentary rocks in Salt Lake City-Coalville-Randolph region (Mississippian) at surface, covers 0.8 % of this area

Lithology: carbonate; sandstone; chert; phosphorite