Felchville Gneiss - aplitic facies (VTY1fga;0)

Felchville Gneiss - aplitic facies

Light-gray to whitish-gray, fine-grained, magnetite trondhjemitic gneiss and aplitic trondhjemite, intricately intrusive into layered paragneisses of the Chester dome; contains xenoliths of more mafic gneiss. U-Pb zircon SHRIMP age of 1,372±11 Ma, no. 4 (Aleinikoff and others, 2011). Similar fine-grained magnetite aplitic gneisses exposed in the Green Mountain massif are associated with tonalitic gneisses on Torment Hill, Weston. South Londonderry Igneous Suite (Middle and Early Mesoproterozoic) (1,393±9 Ma to 1,309±6 Ma). Mount Holly Complex intrusive rocks. Rocks of the Green Mountain and Lincoln Mountain massifs and eastern domes.

State	Vermont
Name	Felchville Gneiss - aplitic facies
Geologic age	Early Mesoproterozoic
Lithologic constituents	Major Metamorphic > Metasedimentary > ParagneissLight-gray to whitish-gray, fine-grained, magnetite trondhjemitic gneiss. Contains xenoliths of more mafic gneiss. Igneous > Plutonic > Granitic > Tonalite > TrondhjemiteAplitic trondhjemite.
References	Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000. https://pubs.er.usgs.gov/publication/sim3184
NGMDB product	NGMDB product page for 96860
Counties	Bennington - Rutland - Windham - Windsor

Felchville Gneiss - aplitic facies

Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000.