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Waits River Formation

Waits River Formation - Gray quartzose and micaceous crystalline limestone weathered to distinctive brown earthy crust; interbedded and intergradational with gray quartz-muscovite phyllite or schist. Where more metamorphosed the limestones contain actinolite, hornblende, zoisite, diopside, wollastonite, and garnet, and the phyllite and schist, biotite, garnet, and locally andalusite, kyanite or sillimanite.
StateVermont
NameWaits River Formation
Geologic ageDevonian
Original map labelDw
CommentsPart of Eastern Vermont The age of the Waits River Formation is considered Silurian and Devonian and is controversial. Silurian age is based on isotopic dating by Aleinikoff and Karabinos (1990) and the Devonian age based on fossils (Hueber and others, 1990) (Ratcliffe, in press) per VT008.
Primary rock typelimestone
Secondary rock typephyllite
Other rock typesmica schist
Lithologic constituents
Major
Sedimentary > Carbonate > LimestoneGray quartzose and micaceous crystalline limestone; where more metamorphosed the limestones contain: actinolite, hornblende, zoisite, diopside, wollastonite, and garnet
Minor
Metamorphic > Schist > Mica-schist > Biotite-schistinterbedded and intergradational with gray quartz-muscovite phyllite or schist; where more metamorphosed: the phyllite and schist contains: biotite, garnet, and locally andalusite, kyanite or sillimanite.
Metamorphic > Metasedimentary > Metaclastic > Phylliteinterbedded and intergradational with gray quartz-muscovite phyllite or schist; where more metamorphosed: the phyllite and schist contains: biotite, garnet, and locally andalusite, kyanite or sillimanite.
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.
Ratcliffe, N.M., in press, Bedrock geologic map of the Cavendish quadrangle, Windsor County, Vermont: U.S. Geological Survey Geologic Quadrangle Map, GQ- __, 1 sheet, scale 1:24,000.
Geographic coverageCaledonia - Essex - Orange - Orleans - Washington - Windham - Windsor

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