Pyroxene and/or hornblende granitic gneiss

Biotitic in part; sodic plagioclase ranges from generally subordinate to locally dominant; plagioclase-rich facies locally contain disseminated magnetite and magnetite ore bodies; grades westward into Yhbg, and southward into Ylg.
State New York
Name Pyroxene and/or hornblende granitic gneiss
Geologic age Middle Proterozoic
Lithologic constituents
Metamorphic > GneissPyroxene and/or hornblende granitic gneiss

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 Clinton - Essex - Franklin