Dominantly white to dark-gray metasedimentary rocks including quartz-chlorite-graphite phyllonite and button schist, and chiastolite-graphite phyllonite; includes mylonitic feldspathic sericite schist and quartz conglomerate, mafic and felsic metavolcanic rocks, mylonitic-ultramylonitic granite and biotite gneiss, and silicified brecciated myloinite. Shearing southeast of Lawrenceville was noted by Corbin (1989).
State Virginia
Name Phyllonite
Geologic age Proterozoic-Paleozoic
Lithologic constituents
Tectonite > Mylonite > Phyllonite
Comments Southeastern Piedmont

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 Brunswick