Robertson River Igneous Suite - Battle Mountain granite (VAZrbg;0)

State	Virginia
Name	Robertson River Igneous Suite - Battle Mountain granite
Geologic age	Proterozoic Z
Original map label	Zrbg
Comments	Blue Ridge Basement Complex, Late Proterozoic Igneous. From expanded explanation (ref. VA002): Granitoid. Light-gray to gray, medium-grained, inequigranular alkali feldspar granite composed of alkali feldspar mesoperthite, albite, and quartz with minor biotite, aegirine, zircon, fluorite, and basnaesite; locally displays miarolitic cavities containing quartz; dated at 705 +/- 2 Ma (U-Pb zircon; Tollo and Aleinikoff, in press).
Primary rock type	granite
Secondary rock type
Other rock types
Lithologic constituents	Major Igneous > Plutonic > Granitic > Granite
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", 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	Culpeper - Fauquier - Rappahannock