Migmatitic Biotite-Hornblende Gneisses

Unconformity; layered biotite-granite gneiss, biotite-hornblende gneiss, amphibolite, calc-silicate rock; locally contains relict granulite facies rock.
State North Carolina
Name Migmatitic Biotite-Hornblende Gneisses
Geologic age Middle Proterozoic
Lithologic constituents
Metamorphic > GneissMigmatitic Biotite-Hornblende Gneisses - (1214 my); layered biotite-granite gneiss, biotite-hornblende gneiss
Metamorphic > Amphibolite
Metamorphic > Metasedimentary > Calc-silicate-rock
Metamorphic > Granulite (Granulite)locally contains relict granulite facies rock.

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 Avery - Buncombe - Madison - Mitchell - Yancey