Theresa (Galway) Formation

Dolostone, sandstone, shale.
State New York
Name Theresa (Galway) Formation
Geologic age Cambrian
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone
Minor
Sedimentary > Clastic > Sandstone
Incidental
Sedimentary > Clastic > Mudstone > Shale
Comments part of Beekmantown and Stockbridge Groups, Potsdam Sandstone, and Vermont Valley Sequence up to 3500 ft. (1100 m). Secondary unit description from USGS Geologic Names lexicon (ref. NY046): Consists of somewhat calcareous, sandy dolomites with interbedded weak sandstones, especially near base. Thickness is 20 to 70 feet.
References

Fisher, D.W., Isachsen, Y.W., and Rickard, L.V., 1970, Geologic Map of New York State, consisting of 5 sheets: Niagara, Finger Lakes, Hudson-Mohawk, Adirondack, and Lower Hudson, New York State Museum and Science Service, Map and Chart Series No. 15, scale 1:250,000.

USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/

https://ngmdb.usgs.gov/Geolex/search

NGMDB product
Counties Fulton - Montgomery - Saratoga