Rusty and gray biotite-quartz-feldspar gneiss (NYYrg;3)

State	New York
Name	Rusty and gray biotite-quartz-feldspar gneiss
Geologic age	Middle Proterozoic
Original map label	rg
Primary rock type	gneiss
Secondary rock type	marble
Other rock types	calc-silicate rock
Lithologic constituents	Major Metamorphic > Gneiss > Biotite-gneissrusty and gray biotite-quartz-feldspar gneiss Incidental Metamorphic > Metasedimentary > Calc-silicate-rockcalcsilicate rock Metamorphic > Metasedimentary > Metacarbonate > Marble
Map references	NYS Museum, NYS Geological Survey, NYS Museum Technology Center, 1999, 1:250,000 Bedrock geology of NYS, data is distributed in ARC/INFOr EXPORT format (with ".e00" extension) in 5 seperate files based on printed map sheets, http://www.nysm.nysed.gov/gis.html. [http://www.nysm.nysed.gov/gis.html.]
Unit references	D. W. Fisher; Y. W. Isachsen, L. V. Rickard, 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 1:250000.
Geographic coverage	Orange - Putnam - Rockland - Westchester