Upper Metagraywacke (SDXgwu;0)

Upper Metagraywacke

Light- to dark-gray, quartz-mica-feldspar schist, quartz-mica schist, staurolite and garnet-rich schist, metaconglomerate, calc-silicate gneiss, and cummingtonite-quartz schist. Thickness up to 14,000 ft (4,267 m).

State	South Dakota
Name	Upper Metagraywacke
Geologic age	Early Proterozoic
Lithologic constituents	Major Metamorphic > Gneiss Metamorphic > Schistquartz-mica-feldspar schist, quartz-mica schist, staurolite and garnet rich schist, cummingtonite-quartz schist Metamorphic > Metasedimentary > Metaclastic > Metaconglomerate
References	Martin, J.E., Sawyer, J.F., Fahrenbach, M.D., Tomhave, D.W., and Schulz, L.D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey, GM 10, scale 1:500,000.
NGMDB product	NGMDB product page for 72317
Counties	Custer

Upper Metagraywacke

Martin, J.E., Sawyer, J.F., Fahrenbach, M.D., Tomhave, D.W., and Schulz, L.D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey, GM 10, scale 1:500,000.