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Stockton Formation

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(Kmmel, 1897) - Light-gray, light-grayishbrown, yellowish- to pinkish-gray, or violet-gray to reddish-brown, medium- to coarse-grained arkosic sandstone and reddish- to purplish-brown mudstone, silty mudstone, argillaceous siltstone, and shale. Mudstone, siltstone and shale beds thicker and more numerous in central Newark basin west of Round Valley Reservoir. Sandstones mostly planar-bedded, with scoured bases containing pebble lags and mudstone rip-ups. Unit is coarser near Newark basin border fault, where poorly exposed, reddish-brown to pinkish-white, medium- to coarse-grained, feldspathic pebbly sandstone and conglomerate (Trss) and pebble to cobble quartzite conglomerate (Trscq). Maximum thickness of formation about 1,240 m (4,070 ft).
State New Jersey
Name Stockton Formation
Geologic age Upper Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Mixed-clastic > Siltstone-mudstone (Bed)
Minor
Sedimentary > Clastic > Siltstone (Bed)argillaceous siltstone
Sedimentary > Clastic > Sandstone > Arkose (Bed)Light-gray, light-grayishbrown, yellowish- to pinkish-gray, or violet-gray to reddish-brown, medium- to coarse-grained arkosic sandstone. Sandstones mostly planar-bedded, with scoured bases containing pebble lags and mudstone rip-ups.
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Incidental
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Conglomerate (Bed)pebble to cobble quartzite conglomerate
Comments Newark Supergroup, Brunswick Group (Lyttle and Epstein, 1987). The Stockton Formation unit description on the map encompasses multiple units (TRs, TRss, and TRscq). The units were split into separate records and appropriate descriptions for each were used. Names for units is from digital map.
References

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.

https://pubs.er.usgs.gov/publication/i2540A

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.

https://pubs.er.usgs.gov/publication/i1715

Kmmel, H.B., 1897, The Newark System; report of progress: New Jersey Geological Survey Annual Report 1896, p. 25-88.
NGMDB product
Counties Bergen - Hudson - Hunterdon