Chopawamsic Formation - Mafic to intermediate metavolcanic rocks (VACAcmv;0)

State	Virginia
Name	Chopawamsic Formation - Mafic to intermediate metavolcanic rocks
Geologic age	Cambrian
Original map label	[cmv
Comments	Central Virginia Volcanic-Plutonic Belt From expanded explanation (ref. VA002): Mafic to intermediate metavolcanic rocks. Dark greenish-gray, fine- to medium-grained, foliated, lineated, amphibole-bearing gneiss and schist. Also includes tuffaceous volcaniclastic rocks. Mineralogy: amphibole + acicular actinolite + epidote + chlorite + titanite + plagioclase + magnetite.
Primary rock type	mafic metavolcanic rock
Secondary rock type	intermediate metavolcanic rock
Other rock types	tuff
Lithologic constituents	Major Metamorphic > Metaigneous > Metavolcanicintermediate to mafic metavolcanic Minor Igneous > Volcanic (Pyroclastic, tuff)Also includes tuffaceous volcaniclastic rocks.
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	Fluvanna - Goochland