Nassau Formation (NYCAn;3)

State	New York
Name	Nassau Formation
Geologic age	Cambrian ?
Original map label	Cn
Comments	part of Eugeosynclinal (Allochthonous) Sequence up to 4000 ft.? (1200 m). On printed map unit has a ? in front of Cn. Age changed to Late Proterozoic to Early Cambrian as per USGS Lexicon website (ref. NY046) according to reference NY005.
Primary rock type	shale
Secondary rock type	quartzite
Other rock types
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > Quartzite Sedimentary > Clastic > Mudstone > Shale
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. Ratcliffe, N.M., 1979, Field guide to the Chatham and Greylock slices of the Taconic allochthon in western Massachusetts and their relationship to the Hoosac-Rowe sequence, IN Friedman, G.M., ed., Joint annual meeting of New York State Geological Association, 51st annual meeting and New England intercollegiate geological conference, 71st annual meeting; Guidebook for field trips: New York State Geological Association Guidebook, no. 51, Joint annual meeting of New York State Geological Association, 51st, and New England Intercollegiate Geological Conference, 71st, Troy, NY, October 5-7, 1979, p.388-425. USGS Geologic Names Lexicon (GEOLEX) [http://ngmdb.usgs.gov/Geolex/]