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Hathaway Formation

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Clasts of limestone, dolostone, sandstone, and chert within beds of black shale and chert. Rocks of the Laurentian Margin. Part of the Adirondack lowlands and Lake Champlain lowlands (west of the Orwell and Champlain thrusts).
State Vermont
Name Hathaway Formation
Geologic age Upper Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)Beds of black shale and chert.
Sedimentary > Chemical > Chert (Bed)Beds of black shale and chert
Minor
Sedimentary > Carbonate > DolostoneClasts of limestone, dolostone, sandstone, and chert within beds of black shale and chert.
Sedimentary > Carbonate > LimestoneClasts of limestone, dolostone, sandstone, and chert within beds of black shale and chert.
Sedimentary > Clastic > SandstoneClasts of limestone, dolostone, sandstone, and chert within beds of black shale and chert.
References

Ratcliffe, N.M., Stanley, R.S., Gale., M.H., Thompson, P.J., and Walsh, G.J., 2011, Bedrock geologic map of Vermont: U.S. Geological Survey Scientific Investigations Map 3184, 3 sheets, scale 1:100,000.

https://pubs.er.usgs.gov/publication/sim3184
NGMDB product
Counties Franklin - Grand Isle