Biotite Granodiorite

Light-gray, medium-grained, foliated. Mineralogy: quartz + potassium feldspar + plagioclase + biotite + muscovite; accessory minerals include epidote, apatite, and opaque minerals.
State Virginia
Name Biotite Granodiorite
Geologic age Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > GranodioriteBiotite granodiorite
Comments Carolina Slate Belt
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 Charlotte - Lunenburg