|Geologic age||Lower Jurassic|
Sedimentary > Clastic > Mudstone (Bed)Irregular mudcracks, symmetrical ripple marks, and burrows, as well as gypsum, glauberite, and halite pseudomorphs are abundant in red mudstone and siltstone.
Sedimentary > Clastic > Sandstone (Bed)reddish-brown to brownish-purple, fine-grained sandstone; gray, fine-grained sandstone may have carbonized plant remains and reptile footprints in middle and upper parts of unit. Sandstone commonly micaceous.
Sedimentary > Clastic > Siltstone (Bed)Red, gray and brownish-purple siltstone and black, blocky, partly dolomitic siltstone and shale common in lower part. Irregular mudcracks, symmetrical ripple marks, and burrows, as well as gypsum, glauberite, and halite pseudomorphs are abundant in red mudstone and siltstone.
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Chemical > Evaporite > Gypsum (Bed)gypsum, glauberite, and halite pseudomorphs are abundant in red mudstone and siltstone.
Sedimentary > Chemical > Evaporite > Salt (Bed)glauberite, and halite pseudomorphs are abundant in red mudstone and siltstone.
|Comments||Newark Supergroup, Brunswick Group (Lyttle and Epstein, 1987). Units Jb and Jbcq are described together on printed map. Seperated them into 2 units, but used same description. Used name for unit from digital map.|
Dalton, R.F., Herman, G.C., Monteverde, D.H., Pristas, R.S., Sugarman, P.J., and Volkert, R.A., 1999, New Jersey Department of Environmental Protection, Bedrock Geology and Topographic Base Maps of New Jersey: New Jersey Geological Survey CD Series CD 00-1; ARC/INFO (v. 7.1), scale 1:100,000.
Drake, Avery A. Jr.,Volkert, Richard, A., Monteverde, Donald H., Herman, Gregory C., Houghton,Hugh F., Parker, Ronald A., and Dalton, Richard F., 1996, Bedrock Geologic Map of Northern New Jersey: U.S. Geological Survey Miscellanenous Investigations Map I-2540-A, 4 cross sections, 2 sheets, size 56x40; 58x41, scale 1:100.000.
Olsen, P.E., 1980, The latest Triassic and Early Jurassic formations of the Newark basin (eastern North America, Newark Supergroup); stratigraphy, structure, and correlation: New Jersey Academy of Science Bulletin, v. 25, no. 2, p. 25-51.
Lyttle, P.T., and Epstein, J.B., 1987, Geologic map of the Newark 1 x 2 degree quadrangle, New Jersey, Pennsylvania, and New York: U.S. Geological Survey Miscellaneous Investigations Series Map I-1715, scale 1:250,00.
|Counties||Essex - Morris - Passaic - Somerset|