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Biotite-plagioclase-quartz gneiss and biotite-muscovite schist

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Variably interlayered, containing subordinate layers of amphibolite and sillimanite-mica schist
State South Carolina
Name Biotite-plagioclase-quartz gneiss and biotite-muscovite schist
Geologic age Cambrian or Neoproterozoic
Lithologic constituents
Major
Metamorphic > Gneiss > Biotite-gneissBiotite-plagioclase-quartz gneiss
Metamorphic > Schist > Mica-schistincludes both biotite-muscovite schist and sillimanite-mica schist
Minor
Metamorphic > Amphibolite
Comments Western Piedmont, layered and stratified rocks
References

Horton, J.Wright, and Dicken, Connie L., 2001, Preliminary Geologic Map of the Appalachian Piedmont and Blue Ridge, South Carolina Segment: U.S. Geological Survey, Open-File Report 01-298, CD, scale 1:500,000.

https://pubs.er.usgs.gov/publication/ofr01298
Counties Abbeville - Anderson - Greenville - Oconee - Pickens