Stockton Formation (NJTRs;5)

Stockton Formation (Kummel, 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
Original map label	Trs
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.
Primary rock type	fine-grained mixed clastic
Secondary rock type	arkose
Other rock types	siltstone; shale; mudstone; sandstone
Lithologic constituents	Major Sedimentary > Clastic > Mixed-clastic > Siltstone-mudstone (Bed) Minor Sedimentary > Clastic > Mudstone (Bed) 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 > Shale (Bed) Sedimentary > Clastic > Siltstone (Bed)argillaceous siltstone Incidental Sedimentary > Clastic > Conglomerate (Bed)pebble to cobble quartzite conglomerate Sedimentary > Clastic > Sandstone (Bed)
Map references	Dalton, R. F., Herman, G. C., Monteverde, D. H., Pristas, R. S., Sugarman, P. J., 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) export file: geology.e00, scale 1:100,000, unit description files: cslegend.pdf and nlegend.pdf, metadata: metast.pdf.
Unit references	Dalton, R. F., Herman, G. C., Monteverde, D. H., Pristas, R. S., Sugarman, P. J., 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) export file: geology.e00, scale 1:100,000, unit description files: cslegend.pdf and nlegend.pdf, metadata: metast.pdf. 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, scale 1 to 100,000, 4 cross sections, 2 sheets, size 56x40; 58x41. [http://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. [http://pubs.er.usgs.gov/publication/i1715] Kmmel, H.B., 1897, The Newark System; report of progress: New Jersey Geological Survey Annual Report 1896, p. 25-88.