State | Virginia |
---|---|
Name | Biotite Granodiorite and Biotite Granite |
Geologic age | Proterozoic Z |
Lithologic constituents |
Major
Igneous > Plutonic > Granitic > Granite
Igneous > Plutonic > Granitic > Granodiorite
Incidental
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite (Dike or sill)
Igneous > Plutonic > Granitic > Leucocratic-granitic > Aplite (Dike or sill)
|
Comments | Blue Ridge Basement Complex, Late Proterozoic Igneous |
References | Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000. |
NGMDB product | |
Counties | Albemarle - Amherst - Bedford - Franklin - Nelson - Roanoke - Rockbridge |