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Tyson Formation - quartz phyllite member

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Rusty-weathering, gray to grayish-green, chlorite-muscovite-quartz phyllite and minor beds of pebbly-quartz metawacke. Eastern and western flank of the Green Mountain massif.
State Vermont
Name Tyson Formation - quartz phyllite member
Geologic age Lower Cambrian and Neoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > PhylliteRusty-weathering, gray to grayish-green, chlorite-muscovite-quartz phyllite.
Minor
Metamorphic > Metasedimentary > Metaclastic > Metasandstone > MetagraywackeMinor beds of pebbly-quartz metawacke.
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 Addison - Rutland - Windsor