Rockfish River Pluton

Rockfish River pluton (Sinha and Bartholomew, 1984). Medium-gray, equigranular medium-grained, vaguely-foliated, fluorite-, epidote-, and garnet-bearing muscovite-biotite granodiorite; aplite and pegmatite dikes cut pluton and surrounding country rock. The pluton has been dated at 730 Ma (U-Pb zircon; Sinha and Bartholomew, 1984, recalculated from Davis, 1974); and 573±50 Ma (Rb-Sr whole-rock; Smith and others, 1981).
State Virginia
Name Rockfish River Pluton
Geologic age Proterozoic Z
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granodiorite
Comments Blue Ridge Basement Complex, Late Proterozoic Igneous
References

Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.

Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.

NGMDB product
Counties Albemarle - Nelson