Biotite-hornblende granite and granite gneiss

Biotite-hornblende granite and granite gneiss.
State New York
Name Biotite-hornblende granite and granite gneiss
Geologic age Middle Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granitebiotite-hornblende granite
Metamorphic > Gneissgranite gneiss
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 Orange