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Hoosac Formation - schist member

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Lustrous, dark-gray to silvery-gray tourmaline-muscovite-biotite-quartz schist and steel-gray muscovitic quartzite. Eastern flank of the Green Mountain massif and eastern domes.
State Vermont
Name Hoosac Formation - schist member
Geologic age Lower Cambrian and Neoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > QuartziteSteel-gray muscovitic quartzite.
Metamorphic > Schist > Mica-schistLustrous, dark-gray to silvery-gray tourmaline-muscovite-biotite-quartz 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 Windham