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Partridge Formation

Partridge Formation - Rusty weathering carbonaceous mica schist locally containing porphyroblasts of biotite, garnet, or staurolite. (Southeastern Vermont).
StateVermont
NamePartridge Formation
Geologic ageOrdovician
Original map labelOp
CommentsPart of Eastern Vermont
Primary rock typemica schist
Secondary rock type
Other rock types
Lithologic constituents
Major
Metamorphic > Schist > Mica-schist > Biotite-schistRusty weathering carbonaceous mica schist locally containing porphyroblasts of biotite, garnet, or staurolite.
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.
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 coverageEssex - Windham - Windsor

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