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Hortonville Formation - conglomerate

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Locally a polymict limestone and dolostone-clast conglomerate. Unit mapped west of the Taconic allochthon, and northwest of the Sudbury slice. Vermont Valley sequence and Middlebury synclinorium (above the Orwell and Champlain thrusts).
State Vermont
Name Hortonville Formation - conglomerate
Geologic age Upper Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > DolostoneLocally a polymict limestone and dolostone-clast conglomerate.
Sedimentary > Carbonate > LimestoneLocally a polymict limestone and dolostone-clast conglomerate.
Sedimentary > Clastic > ConglomerateLocally a polymict limestone and dolostone-clast conglomerate.
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
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Counties Addison