Interlayered Mafic and Felsic Metavolcanic Rocks - Quartz-muscovite schist and gneiss. (VACAsg;0)

State	Virginia
Name	Interlayered Mafic and Felsic Metavolcanic Rocks - Quartz-muscovite schist and gneiss.
Geologic age	Cambrian
Original map label	[sg
Comments	Central Virginia Volcanic-Plutonic Belt. From expanded explanation (ref.VA002): Heterogenous layered assemblage correlates with the Chopawamsic Formation and Ta River Metamorphic Suite, on strike to the northeast, and in traceable into the Milton belt in North Carolina (Geologic Map of North Carolina, 1985). Quartz muscovite schist and gneiss. Very-light-gray to light-bluish-gray, fine- to medium-grained, layered kyanite mica schist, kyanite and sillimanite quartzite, and interlayered biotite-garnet schist. Mineralogy: quartz + muscovite + plagioclase +/- biotite +/- garnet +/- sillimanite +/- kyanite +/- magnetite. Includes the schist and gneiss unit of Tobisch (1972), and muscovite-quartz schist of Baird (1989, 1991).
Primary rock type	pelitic schist
Secondary rock type	gneiss
Other rock types
Lithologic constituents	Major Metamorphic > Schist > Mica-schistpelitic schist Metamorphic > Gneiss
Map references	Digital Representation of the 1993 Geologic Map of Virginia", 2003, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, viewing software not included. This is a digital version of "Geologic Map of Virginia" published in 1993. Available from: https://www.dmme.virginia.gov/commerce/ [https://www.dmme.virginia.gov/commerce/]
Unit references	Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000 Digital Representation of the 1993 Geologic Map of Virginia - expanded explanation: 2003, Commonwealth of Virginia, Department of Mines, Minerals, and Energy, Divsion of Mineral Resources, Publication 147, 85 pp Digital Representation of the 1993 Geologic Map of Virginia", 2003, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, viewing software not included. This is a digital version of "Geologic Map of Virginia" published in 1993. Available from: https://www.dmme.virginia.gov/commerce/ [https://www.dmme.virginia.gov/commerce/]
Geographic coverage	Buckingham - Halifax - Pittsylvania - Danville