Trondhjemite (VAOCAtj;0)

Trondhjemite

Trondhjemite (Pavlides, 1990). Light-gray, leucocratic, fine-grained, allotriomorphic-granular; composed of intergrown albite and quartz exhibiting granophyric texture. Blue-green amphibole and garnet are present locally.

State	Virginia
Name	Trondhjemite
Geologic age	Cambrian-Ordovician
Lithologic constituents	Major Igneous > Plutonic > Granitic > Tonalite > Trondhjemite
Comments	Central Virginia Volcanic-Plutonic 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	NGMDB product page for 34878
Counties	Stafford

Trondhjemite

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.