Muscovite Schist and Gneiss (VAYms;0)

State	Virginia
Name	Muscovite Schist and Gneiss
Geologic age	Proterozoic Y
Original map label	Yms
Comments	Eastern Piedmont From expanded explanation (ref. VA002): Muscovite schist and gneiss. Light-gray to silvery gray, medium-grained, strongly-foliated quartz-muscovite schist; occurs as discontinuous lenses within porphyroblastic garnet-biotite gneiss (Ymd).
Primary rock type	gneiss
Secondary rock type	mica schist
Other rock types
Lithologic constituents	Major Metamorphic > Gneiss > Biotite-gneiss Metamorphic > Schist > Mica-schist > Muscovite-schist
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	Amelia