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West Hill and Gardeau Formations

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Shale, siltstone; Roricks Glen Shale; upper Beers Hill Shale; Grimes Siltstone.
State New York
Name West Hill and Gardeau Formations
Geologic age Upper Devonian
Lithologic constituents
Major
Sedimentary > Clastic > SiltstoneGrimes Siltstone
Sedimentary > Clastic > Mudstone > Shale
Comments part of West Falls Group 400-950 ft. (120-290 m).
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 Livingston - Ontario - Steuben - Wyoming - Yates