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Metamorphosed Tuffaceous Shale

Light-gray to light-tan, muscovite schist and muscovite phylite. Thickness approximately 1,000-3,000 ft (305-914 m).
StateSouth Dakota
NameMetamorphosed Tuffaceous Shale
Geologic ageProterozoic | Paleoproterozoic
Original map labelXms
Primary rock typeschist
Secondary rock typephyllite
Other rock types
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Metamorphic > Schist
Map 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
Unit 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
Geographic coverageCuster - Lawrence - Pennington

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