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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.
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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 |
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Counties |
Bennington - Rutland - Windham - Windsor
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