Roan Gneiss (TNpCAr;15)

State	Tennessee
Name	Roan Gneiss
Geologic age	Precambrian
Original map label	pCr
Comments	East sheet
Primary rock type	gneiss
Secondary rock type	migmatite
Other rock types	mica schist; amphibolite; gabbro; granite
Lithologic constituents	Major Metamorphic > Gneiss Minor Metamorphic > Amphibolite Metamorphic > Schist Metamorphic > Migmatite Incidental Igneous > Plutonic > Granitic > Granite (Dike or sill) Igneous > Plutonic > Gabbroic > Gabbro (Dike or sill)
Map references	Geology available at Tennesse Spatial Data Server which can be found at http://www.tngis.org/geology.html which links to a USGS Water Resources Division site: http://water.usgs.gov/lookup/getspatial?geo250k Tennessee Spatial Data Server site notes: Thanks goes to Jim Julian for researching this improved geology layer from the Tennessee Division of Geology. Note - The Tennessee Division of Geology does not endorse this coverage, stating this version is still incomplete and not fit for distribution. [http://www.tngis.org/geology.html] [http://water.usgs.gov/lookup/getspatial?geo250k]
Unit references	Geology available at Tennesse Spatial Data Server which can be found at http://www.tngis.org/geology.html which links to a USGS Water Resources Division site: http://water.usgs.gov/lookup/getspatial?geo250k Tennessee Spatial Data Server site notes: Thanks goes to Jim Julian for researching this improved geology layer from the Tennessee Division of Geology. Note - The Tennessee Division of Geology does not endorse this coverage, stating this version is still incomplete and not fit for distribution. [http://www.tngis.org/geology.html] [http://water.usgs.gov/lookup/getspatial?geo250k] Hardeman, W.D., and others, 1966, Geologic map of Tennessee: Division of Geology, Tennessee Department of Environment and Conservation, scale 1:250,000
Geographic coverage	Carter - Unicoi