Mobley Mountain Granite (VAZgdm;0)

State	Virginia
Name	Mobley Mountain Granite
Geologic age	Proterozoic Z
Original map label	Zgdm
Comments	Blue Ridge Basement Complex, Late Proterozoic Igneous. From expanded explanataion (ref. VA002): Mobley Mountain granite (Brock and others, 1987; Herz and Force, 1987). Leucocratic to mesocratic, medium-grained, equigranular, epidote-, florencite-, garnet-, and fluorite-bearing muscovite-biotite granite; faintly foliated. Salt and- pepper appearance is characteristic; aplite and pegmatite dikes cut the pluton and surrounding country rock. Dated at 652 +/- 22 Ma (Rb-Sr whole rock; Brock and others, 1987).
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 - 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	Amherst