Metamorphosed Carbonaceous Shale

Dark-gray to gray, siliceous biotite phyllite, calcareous biotite phyllite, and schist. Minimum thickness 1,500 ft (457 m).
State South Dakota
Name Metamorphosed Carbonaceous Shale
Geologic age Early Proterozoic
Lithologic constituents
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Metamorphic > Schist

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
Counties Lawrence - Pennington