Fine-grained Biotite Gneiss

Strongly foliated; minor layers of amphibolite and muscovite schist.
State North Carolina
Name Fine-grained Biotite Gneiss
Geologic age Cambrian/Late Proterozoic
Lithologic constituents
Major
Metamorphic > Gneiss > Biotite-gneissFine-grained Biotite Gneiss - strongly foliated
Minor
Metamorphic > Schist > Mica-schist > Muscovite-schist
Metamorphic > Amphibolite
References

Rhodes, Thomas S., and Conrad, Stephen G., 1985, Geologic Map of North Carolina: Department of Natural Resources and Community Development, Division of Land Resources, and the NC Geological Survey, compiled by Brown, Philip M., et al, and Parker, John M. III, and in association with the State Geologic Map Advisory Committee, scale 1:500,000.

The North Carolina Dept. of Environment, Health, and Natural Resources, Division of Land Resources, NC Geological Survey, in cooperation with the NC Center for Geographic Information and Analysis, 1998 (updated 2007), Geology - North Carolina (1:250,000), coverage data file geol250. The data represents the digital equivalent of the official State Geology map (1:500,000 scale), but was digitized from (1:250,000 scale) base maps.

NGMDB product
Counties Surry - Wilkes - Yadkin