Metamorphosed Carbonaceous Shale

Dark-gray to gray, siliceous biotite phyllite and schist. Thickness greater than 2,500 ft (762m).
State South Dakota
Name Metamorphosed Carbonaceous Shale
Geologic age Early Proterozoic
Lithologic constituents
Major
Metamorphic > Schist
Metamorphic > Metasedimentary > Metaclastic > Phyllite
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
Counties Lawrence - Pennington