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
NGMDB product
Counties Bennington - Rutland - Windham - Windsor