Hoosac Formation, Amphibolite and Greenstone (VTCAhog;0)

State	Vermont
Name	Hoosac Formation, Amphibolite and Greenstone
Geologic age	Cambrian
Original map label	Chog
Comments	Part of Green Mountains, Camels Hump Group Age changed to Late Proterozoic and Early Cambrian (Ratcliffe and others, 1993) per VT004.
Primary rock type	amphibolite
Secondary rock type	greenstone
Other rock types
Lithologic constituents	Major Metamorphic > Metaigneous > Greenstoneactinolitic greenstone Metamorphic > Amphibolite
Map references	Nicholson, S.W., Dicken, C.L., Horton, J.D., Foose, M.P., Mueller, J.A.L., and Hon, Rudi, 2006, Preliminary integrated geologic map databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, and Vermont: U.S. Geological Survey Open-File Report 2006-1272. [http://pubs.er.usgs.gov/publication/ofr20061272]
Unit references	Doll, C.G., Cady, W.M., Thompson, J.B., Jr., and Billings, M.P., 1961, Centennial Geologic Map of Vermont: Vermont Geological Survey, Miscellaneous Map MISCMAP-01, scale 1:250,000. Ratcliffe, N.M., Potter, D.B. and Stanley, R.S., 1993, Bedrock geologic map of the Williamstown and North Adams quadrangles, Massachusetts and Vermont, and part of the Cheshire quadrangle, Massachusetts: U.S. Geological Survey Miscellaneous Investigations Series Map, I-2369, 13 p., 2 sheets, scale 1:24,000. [http://pubs.er.usgs.gov/publication/i2369]
Geographic coverage	Bennington - Windham