Metamorphosed Shale

Gray to dark-gray phylite, slate, and mica schist. Estimated thickness at least 5,000 ft (1,524 m).
State South Dakota
Name Metamorphosed Shale
Geologic age Early Proterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Slate
Metamorphic > Schist > Mica-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