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Wallhalla metamorphic suite

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Predominately hornblende-plagioclase gneiss and amphibolite, locally having interlayers of biotite-quartz-feldspar gneiss, undivided
State South Carolina
Name Wallhalla metamorphic suite
Geologic age Cambrian or Neoproterozoic
Lithologic constituents
Major
Metamorphic > Amphibolite
Metamorphic > Gneiss > Hornblende-gneiss
Minor
Metamorphic > Gneiss > Biotite-gneissbiotite-quartz-feldspar gneiss
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 Oconee - Pickens