Metamorphosed Black Shale (SDXbs;0)

Metamorphosed Black Shale

Dark-gray biotite schist, biotite-muscovite schist, pyritic biotite schist, and local massive chert beds. Thickness approximately 2000-4000 ft (610-1,219 m).

State	South Dakota
Name	Metamorphosed Black Shale
Geologic age	Early Proterozoic
Lithologic constituents	Major Metamorphic > Schist > Mica-schist > Biotite-schistbiotite-muscovite schist, pyritic biotite schist Minor Sedimentary > Chemical > Chert (Bed)
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 - Lawrence - Pennington

Metamorphosed Black Shale

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.