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Highgate Formation

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Banded limestone and calcareous slate with local lenses of conglomerate composed of limestone, sandstone, and dolostone clasts in a sandy limestone matrix. Cover rocks of the Saint Albans area.
State Vermont
Name Highgate Formation
Geologic age Lower Ordovician
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > SlateBanded limestone and calcareous slate.
Sedimentary > Carbonate > LimestoneBanded limestone and calcareous slate with local lenses of conglomerate composed of limestone, sandstone, and dolostone clasts in a sandy limestone matrix.
Minor
Sedimentary > Clastic > Sandstone (Lens)Local lenses of conglomerate composed of limestone, sandstone, and dolostone clasts in a sandy limestone matrix.
Sedimentary > Carbonate > Dolostone (Lens)Local lenses of conglomerate composed of limestone, sandstone, and dolostone clasts in a sandy limestone matrix.
Sedimentary > Clastic > Conglomerate (Lens)Local lenses of conglomerate composed of limestone, sandstone, and dolostone clasts in a sandy limestone matrix.
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