Amphibolite and Amphibole-Bearing Gneiss and Schist

Dark-gray to black, medium-grained, strongly foliated and lineated. Mineralogy: hornblende + plagioclase + biotite + quartz + epidote; apatite, titanite, and magnetite are accessory minerals. Geophysical signature: strike-elongate positive magnetic anomalies. These rocks are interlayered with migmatitic paragneiss (mpg).
State Virginia
Name Amphibolite and Amphibole-Bearing Gneiss and Schist
Geologic age Proterozoic
Lithologic constituents
Major
Metamorphic > Gneiss
Metamorphic > Amphibolite
Metamorphic > Schist
Comments 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
Counties Amelia - Nottoway - Prince Edward