Briarcliff Dolostone and Pine Plains Formation (NYCAw;3)

State	New York
Name	Briarcliff Dolostone and Pine Plains Formation
Geologic age	Cambrian
Original map label	Cw
Comments	part of Wappinger and Stockbridge Groups, Poughquag Quartzite, and Metamorphic Equivalents up to 4000 ft. (1200 m). Age changed to Late Cambrian as per USGS Lexicon website (ref. NY046) according to reference NY007.
Primary rock type	dolostone (dolomite)
Secondary rock type	shale
Other rock types	chert
Lithologic constituents	Major Sedimentary > Carbonate > Dolostone Minor Sedimentary > Clastic > Mudstone > ShalePine Plains Formation Incidental Sedimentary > Chemical > ChertBriarcliff-locally cherty
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. Knopf, E.B., 1956, Stratigraphy and structure of the Stissing area, Dutchess County, New York [abs.]: Geological Society of America Bulletin, v. 67, no. 12, pt. 2, p. 1817-1818. USGS Geologic Names Lexicon (GEOLEX) [http://ngmdb.usgs.gov/Geolex/]