Hornblende-plagioclase Gabbro (VAga;0)

Hornblende-plagioclase Gabbro

Dark-grayish-green, coarse- to medium-grained, massive to foliated metagabbro. Mineralogy: amphibole + plagioclase + clinopyroxene + quartz + biotite + muscovite + epidote ± magnetite. Geophysical signature: small circular positive magnetic anomalies. Plutons of these gabbros intrude interlayered mafic and felsic metavolcanic rocks.

State	Virginia
Name	Hornblende-plagioclase Gabbro
Geologic age	Proterozoic
Lithologic constituents	Major Igneous > Plutonic > Gabbroic > Gabbrohornblende gabbro Minor Igneous > Plutonic > Ultramafic > Hornblendite Igneous > Plutonic > Gabbroic > Gabbro > Norite
Comments	Carolina Slate Belt; Central Virginia Volcanic-Plutonic Belt; Central Piedmont
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	Amelia - Charlotte - Halifax - Lunenburg - Mecklenburg - Prince Edward

Hornblende-plagioclase Gabbro

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.