Grandfather Mountain Formation; Greenstone

Schistose to massive, amygdaloidal; interlayered with metasedimentary rocks. Includes Montezuma Member (metabasalt) in upper part.
State North Carolina
Name Grandfather Mountain Formation; Greenstone
Geologic age Late Proterozoic
Lithologic constituents
Metamorphic > Metaigneous > GreenstoneGreenstone - schistose to massive, amygdaloidal
Metamorphic > Metaigneous > Metavolcanic > MetabasaltIncludes Montezuma Member (metabasalt) in upper part
Metamorphic > Metasedimentaryinterlayered with metasedimentary rocks

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 - Burke - Caldwell - Watauga