Roan Gneiss

Layered hornblende and garnet gneiss and granitic migmatite with zones of mica schist and amphibolite, foliation commonly contorted; contains numerous granitic and gabbroic dikes.
State Tennessee
Name Roan Gneiss
Geologic age Precambrian
Lithologic constituents
Metamorphic > Gneiss
Metamorphic > Amphibolite
Metamorphic > Migmatite
Metamorphic > Schist
Igneous > Plutonic > Granitic > Granite (Dike or sill)
Igneous > Plutonic > Gabbroic > Gabbro (Dike or sill)
Comments East sheet

Greene, D.C., and Wolfe, W.J., 2000, Superfund GIS - 1:250,000 Geology of Tennessee, USGS, (geo250k).

Hardeman, W.D., Miller, R.A., and Swingle, G.D., 1966, Geologic Map of Tennessee: Division of Geology, Tennessee Department of Environment and Conservation, 4 sheets, scale 1:250,000

NGMDB product
Counties Carter - Unicoi