|Geologic age||Early Jurassic|
Igneous > Volcanic > Mafic-volcanic > Basalt (Diabase)gray, white, and black dense rock composed mostly of plagioclase feldspar, augite, and quartz.
|Comments||part of Newark Group 0-7000 ft. (0-2100 m). Unit description and age change from USGS Lexicon website (ref. NY046) and reference NY003:Occurs in a belt that stretches northeast to southwest in the northwest portion of western Staten Island, NY, adjacent to a belt of Lockatong Formation. It is a gray, white, and black dense rock composed mostly of plagioclase feldspar, augite, and quartz, and exhibits very little weathering and fracturing (Pagano, 1994).|
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.
Pagano, T.S., 1994, The geology of western Staten Island, New York, north and south of the Fall Line, IN Benimoff, A.L., ed., Geology of Staten Island, New York; field guide and proceedings: Geological Association of New Jersey Annual Field Conference, v. 11, 11th Annual Meeting, October 14-15, 1994, p. 61-84.
USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/
|Counties||Richmond - Rockland|