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Gile Mountain Formation - quartzite and metapelite member

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Gray to light-gray, fine-grained micaceous quartzite a few centimeters to tens of centimeters thick, interbedded with dark-gray graphitic slate, phyllite, or schist. Part of the Connecticut Valley Trough.
State Vermont
Name Gile Mountain Formation - quartzite and metapelite member
Geologic age Lower Devonian
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > QuartziteGray to light-gray, fine-grained micaceous quartzite.
Minor
Metamorphic > Metasedimentary > Metaclastic > PhylliteDark-gray graphitic slate, phyllite, or schist.
Metamorphic > Schist > Pelitic-schistDark-gray graphitic slate, phyllite, or schist.
Metamorphic > Metasedimentary > Metaclastic > SlateDark-gray graphitic slate, phyllite, or schist.
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
Counties Caledonia - Essex - Orange - Orleans - Windsor