State | New York |
---|---|
Name | Biotite and/or hornblende granite gneiss |
Geologic age | Middle Proterozoic |
Lithologic constituents |
Major
Metamorphic > GneissBiotite and/or hornblende granite gneiss, leucogranitic gneiss, biotite-quartz-plagioclase gneiss
Minor
Metamorphic > Metasedimentarymetasedimentary rocks
Incidental
Metamorphic > Amphibolite
Metamorphic > Migmatite
|
Comments | Printed map does not contain a unit named 'hbgo'; only a unit named 'hbg' and mentions that 'overprint signifies inequigranular texture or phacoidal structure'. Overprint means that a different pattern is used over the color of unit 'hbg'. The digital version of the map has separated this unit out into a new unit and called it 'hbgo', so I have included it here. |
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 | Herkimer - Lewis |