|Name||Passaic Formation gray bed|
|Geologic age||Lower Jurassic and Upper Triassic|
Sedimentary > Clastic > Mixed-clastic > Siltstone-mudstone (Bed)gray and greenish- to purplish-gray argillaceous siltstone
Sedimentary > Clastic > Sandstone (Bed)medium- to dark-gray, argillaceous, fine-grained sandstone
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
|Comments||Part of the Brunswick Group. This unit's description is combined with JTRp (Passaic Formation) on the printed map. However, it is mapped seperately, so the description has been separated into two records. Also, this unit is called the 'gray bed' because that is what is used in the 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.
Owens, James P., Sugarman, Peter J., Sohl, Norman F., Parker, Ronald A., Houghton, Hugh F., Volkert, Richard A., Drake, Avery A., Jr., and Orndorff, Randall C., 1998, Bedrock Geologic Map of Central and Southern New Jersey: U.S. Geological Survey Miscellaneous Investigations Series Map I-2540-B, 8 cross sections, 4 sheets, each size 58x41, scale 1:100,000.
|Counties||Hunterdon - Mercer - Middlesex - Somerset|