Glenerie Formation

Limestone, chert.
State New York
Name Glenerie Formation
Geologic age Lower Devonian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Chemical > Chert
Sedimentary > Clastic > Mudstone > Shale
Incidental
Sedimentary > Clastic > Conglomerate
Comments part of Onondaga Limestone and Ulster Group 100-500 ft. (30-150 m). Secondary unit description from USGS Geologic Names lexicon (ref. NY046): Composition of the Glenerie limestone ranges from limestone to solid chert beds, soft shale, and conglomerate. Beds are very blue to nearly black in fresh exposures; characteristically weather buff brown. Thickness is about 30 ft in type exposure. Overlies the Port Ewen beds in type area, but overlies the Connelly conglomerate farther to south.
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.

NGMDB product
Counties Albany - Greene - Schoharie