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Brunswick Formation

Brunswick Formation - sandstone, siltstone and mudstone.
State New York
Name Brunswick Formation
Geologic age Upper Triassic
Comments part of Newark Group 0-7000 ft. (0-2100 m). Unit description from USGS Lexicon website (ref. NY046) and reference NY045: The rank of the Brunswick is raised to Brunswick Group of the Newark Supergroup in NJ, NY, and PA. It includes the Passaic Formation of Olsen (1980), in NJ and NY, the Orange Mountain Basalt in NJ and NY, the Feltville Formation in NJ, the Preakness Basalt in NJ and NY, and the Towaco Formation, Hook Mountain Basalt, and Boonton Formation in NJ. In PA, the Brunswick Group is divided into the lower part, equivalent to the Passaic, the Jacksonwald Basalt, equivalent to the Orange Mountain, and the upper part, equivalent to the Feltville (Lyttle and Epstein, 1987).
Primary rock type sandstone
Secondary rock type siltstone
Other rock types mudstone
Lithologic constituents
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,
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.
Lyttle, P.T. and Epstein, J.B., 1987, Bedrock geologic map of the Newark 2 degrees quadrangle, New York, New Jersey, and Pennsylvania: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1715, 1 sheet, scale 1:250,000.
USGS Geologic Names Lexicon (GEOLEX)
Counties Rockland