State | New York |
---|---|
Name | Biotite and/or hornblende granite gneiss |
Geologic age | Middle Proterozoic |
Lithologic constituents |
Major
Metamorphic > GneissBiotite and/or hornblende granite gneiss - locally pyroxenic; commonly with subordinate leucogranitic gneiss, biotite-quartz-plagioclase gneiss.
Minor
Metamorphic > Metasedimentarymetasedimentary rocks
Incidental
Metamorphic > Migmatite
Metamorphic > Amphibolite
|
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 | Essex - Franklin - Hamilton - Herkimer - Jefferson - Lewis - Saint Lawrence - Warren - Washington |