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Hathaway Formation

Hathaway Formation - Gray to black argillite and bedded radiolarian chert, with included blocks and fragments of chert, limestone, dolomite, sandstone and graywacke.
State Vermont
Name Hathaway Formation
Geologic age Ordovician
Comments Part of Champlain and Vermont Valleys, Trenton Group
Primary rock type argillite
Secondary rock type chert
Other rock types limestone; dolostone (dolomite); sandstone; graywacke
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Argillite
Sedimentary > Chemical > Chert (Bed)bedded radiolarian chert, with included blocks and fragments of chert
Incidental
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Sandstone > Graywacke (Bed)
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 Chittenden - Franklin - Grand Isle