Megacrystic biotite gneiss

Variably layered biotite-quartz-feldspar gneiss having porphyroclasts and/or porphyroblasts of plagioclase and locally of quartz and potassium feldspar
State South Carolina
Name Megacrystic biotite gneiss
Geologic age Cambrian or Neoproterozoic
Lithologic constituents
Metamorphic > Gneiss > Biotite-gneissbiotite-quartz-feldspar gneiss
Comments Western Piedmont, layered and stratified rocks
Counties Greenville - Spartanburg