Dalton Formation - dark phyllite member (VTCAZdb;0)

Dalton Formation - dark phyllite member

Dark-gray to gray, rusty-weathering, well-laminated tourmaline-biotite-muscovite-quartz phyllite containing thin beds of laminated quartzite. Resembles dark phyllite of the Moosalamoo Formation (CZmp), with which it is in part correlative. Unit interfingers to the north with rocks of the Tyson Formation and to the east with rocks of the Hoosac Formation. Cover rocks of the Southern Green Mountains.

State	Vermont
Name	Dalton Formation - dark phyllite member
Geologic age	Lower Cambrian and Neoproterozoic
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > PhylliteDark-gray to gray, rusty-weathering, well-laminated tourmaline-biotite-muscovite-quartz phyllite. Minor Metamorphic > Metasedimentary > Metaclastic > QuartziteThin beds of laminated quartzite.
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	NGMDB product page for 96860
Counties	Bennington - Rutland

Dalton Formation - dark phyllite member

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.