Missisquoi Formation, Moretown Member (VTOmm;0)

Missisquoi Formation, Moretown Member - Quartzite and quartz-plagioclase granulite, in layers 1/8 to several inches thick, separated by "pinstripe" partings that contain muscovite, chlorite, epidote, biotite, and locally garnet; also greenish quartz-sericite-chlorite phyllite and schist, and minor carbonaceous phyllite. Schist and phyllite commonly contain biotite and garnet porphyroblasts in southern Vermont.

State	Vermont
Name	Missisquoi Formation, Moretown Member
Geologic age	Ordovician
Original map label	Omm
Comments	Part of Green Mountains
Primary rock type	granulite
Secondary rock type	quartzite
Other rock types	phyllite; schist
Lithologic constituents	Major Metamorphic > Granulitequartz-plagioclase granulite Minor Metamorphic > SchistGreenish quartz-sericite-chlorite phyllite and schist, and minor carbonaceous phyllite. Schist and phyllite commonly contain biotite and garnet porphyroblasts in southern Vermont. Metamorphic > Metasedimentary > Metaclastic > PhylliteGreenish quartz-sericite-chlorite phyllite and schist, and minor carbonaceous phyllite. Schist and phyllite commonly contain biotite and garnet porphyroblasts in southern Vermont. Metamorphic > Metasedimentary > Metaclastic > Quartzite
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.
Geographic coverage	Caledonia - Lamoille - Orange - Orleans - Rutland - Washington - Windham - Windsor