Schist, gneiss, and granite

Schist, gneiss, and granite (1.5 billion years old).
State Utah
Name Schist, gneiss, and granite
Geologic age Precambrian
Lithologic constituents
Major
Metamorphic (Amphibolite)
Minor
Sedimentary > Clastic > Mudstone (Bed)the Cluar Group overlying metamorphic rocks
Igneous > Plutonic (Pluton, Dike or sill)
Comments Drilling shows that the Chuar Group (younger, 800-742 m.y.) is under the Grand Staircase-Escalante National Monument (Chidsey, 1998) and pink granite (1.5 Ga) under Canyonlands
Stratigraphic units Chuar Group
References

Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.

Dehler, C.M., Elrick, M., Karlstrom, K.E., Smith, G.A., Crossey, L.J., and Timmons, J.M., 2001, Neoproterozoic Chuar Group ( approximately 800-742 Ma), Grand Canyon; a record of cyclic marine deposition during global cooling and supercontinent rifting: Sedimentary Geology, v. 141-142, p. 465-499.

Chidsey, T.C., Jr., 1998, Hydrocarbon potential in the Grand Staircase-Escalante National Monument, Utah : Petroleum News (Salt Lake City), v. January, p. 9.

NGMDB product
Counties Grand