Poughquag Quartzite (NYCApg;3)

State	New York
Name	Poughquag Quartzite
Geologic age	Cambrian
Original map label	Cpg
Comments	part of Wappinger and Stockbridge Groups, Poughquag Quartzite, and Metamorphic Equivalents up to 4000 ft. (1200 m). Secondary unit description from USGS Lexicon website (ref. NY046) and reference NY042: Poughquag is shown as basal formation of Wappinger Group, conformably underlying Stissing Dolomite and nonconformably overlying Precambrian basement. The Wappinger is assigned to the Sauk Sequence in this report. Age is Early Cambrian (Sanders, 1995).
Primary rock type	quartzite
Secondary rock type	conglomerate
Other rock types
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > Quartzite Minor Sedimentary > Clastic > Conglomeratelocally conglomeratic
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. Sanders, J.E., 1995, Lower Paleozoic carbonate-clast diamictites; relationship to thrust sheets that advanced across the floor of the northern Appalachian Ordovician foreland basin: Northeastern Geology and Environmental Sciences, v. 17, no.1, p. 23-45. USGS Geologic Names Lexicon (GEOLEX) [http://ngmdb.usgs.gov/Geolex/]
Geographic coverage	Dutchess - Orange - Putnam - Rockland - Westchester