Ottauquechee Formation - black quartzite member (VTCAobq;0)

Ottauquechee Formation - black quartzite member

Dark-bluish-gray to black, fine-grained vitreous quartzite. Beds are as thick as 30 m or are thin and interbedded with black phyllite. Rocks of the Rowe-Hawley Zone. Allochthonous cover sequence east of the Green Mountains: rift and drift stage metasedimentary and metavolcanic rocks and tectonic inclusions of ultramafic rocks.

State	Vermont
Name	Ottauquechee Formation - black quartzite member
Geologic age	Cambrian
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > QuartziteDark-bluish-gray to black, fine-grained vitreous quartzite. Minor Metamorphic > Metasedimentary > Metaclastic > PhylliteInterbedded with black phyllite.
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	Addison - Rutland - Washington - Windsor

Ottauquechee Formation - black quartzite 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.