Amphibolite and Amphibole-Bearing Gneiss and Schist (VAamr;0)

State	Virginia
Name	Amphibolite and Amphibole-Bearing Gneiss and Schist
Geologic age	Proterozoic
Original map label	amr
Comments	Central Piedmont From expanded explanation (ref. VA002): Amphibolite and amphibole-bearing gneiss and schist. Dark-gray to black, medium-grained, strongly foliated and lineated. Mineralogy: hornblende + plagioclase + biotite + quartz + epidote; apatite, titanite, and magnetite are accessory minerals. Geophysical signature: strike-elongate positive magnetic anomalies. These rocks are interlayered with migmatitic paragneiss (mpg).
Primary rock type	amphibolite
Secondary rock type	gneiss
Other rock types	schist
Lithologic constituents
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 - Nottoway - Prince Edward