Austin Glen Formation

Graywacke, shale
State New York
Name Austin Glen Formation
Geologic age Middle Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Graywacke
Sedimentary > Clastic > Mudstone > Shale
Comments part of Lorraine, Trenton, and Black River Groups up to 4500 ft. (1400 m) and part of Eugeosynclinal (Allochthonous) Sequence up to 6000 ft.? (2000 m). Note that unit is used twice on printed map (with same color, but different pattern). Unit description is the same, so added the sequence it is mentioned in to the description.
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 - Columbia - Dutchess - Greene - Rensselaer - Saratoga - Ulster - Washington