Metatonalite

White to light-gray, medium- to coarse-grained, faintly foliated, locally porphyritic; ranges from granodiorite to quartz diorite. Mineralogy: quartz + plagioclase + biotite + microcline. This unit includes the Vance pluton of Horton and others (1993), dated at 571±17 Ma (U-Pb zircon; LeHuray, 1989).
State Virginia
Name Metatonalite
Geologic age Proterozoic
Lithologic constituents
Major
Metamorphic > Metaigneous > Metaintrusive > Metatonaliteranges from granodiorite to quartz diorite.
Minor
Metamorphic > Metaigneous > Metaintrusive > Metadioriteranges from granodiorite to quartz diorite.
Comments Carolina Slate Belt
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 Lunenburg - Mecklenburg