Ammonoosuc Volcanics of Billings (1935) - metasiltstone and phyllite (VTOam;0)

Ammonoosuc Volcanics of Billings (1935) - metasiltstone and phyllite

Medium-light-bluish-gray, medium-bluish-gray, medium-dark-gray, to medium-dark-greenish-gray metasiltstone and phyllite, and medium-gray feldspathic metawacke. Purple tinge common; coticule and magnetite locally abundant. Stratified rocks of the Bronson Hill arch and Sawyer Mountain belt.

State	Vermont
Name	Ammonoosuc Volcanics of Billings (1935) - metasiltstone and phyllite
Geologic age	Upper and Middle Ordovician
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > Metasandstone > MetagraywackeMedium-gray feldspathic metawacke. Metamorphic > Metasedimentary > Metaclastic > PhylliteMedium-light-bluish-gray, medium-bluish-gray, medium-dark-gray, to medium-dark-greenish-gray metasiltstone and phyllite. Metamorphic > Metasedimentary > Metaclastic > MetasiltstoneMedium-light-bluish-gray, medium-bluish-gray, medium-dark-gray, to medium-dark-greenish-gray metasiltstone and 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	Caledonia - Essex

Ammonoosuc Volcanics of Billings (1935) - metasiltstone and phyllite

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.