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Hatch Hill and West Castleton Formations, Undifferentiated

Hatch Hill and West Castleton Formations, Undifferentiated - The Hatch Hill, a relatively thin formation that succeeds the West Castleton, is characterized by rusty and spongy weathered gray calcareous quartzite traversed by numerous white-quartz viens. The West Castleton is a gray to black, siliceous, carbonaceous, and pyritiferous slate containing paper-thin white sandy laminae. Black slates are common to both formations. A blue-gray weathered black limestone is near the base of the West Castleton in a few places.
State Vermont
Name Hatch Hill and West Castleton Formations, Undifferentiated
Geologic age Cambrian
Comments Part of Taconic Range
Primary rock type quartzite
Secondary rock type slate
Other rock types limestone
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > QuartziteHatch Hill: characterized by rusty and spongy weathered gray calcareous quartzite traversed by numerous white-quartz viens.
Metamorphic > Metasedimentary > Metaclastic > SlateWest Castleton is a gray to black, siliceous, carbonaceous, and pyritiferous slate containing paper-thin white sandy laminae. Black slates are common to both formations.
Incidental
Sedimentary > Carbonate > Limestoneblue-gray weathered black limestone is near the base of the West Castleton in a few places
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.
Counties Addison - Bennington - Rutland