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Jacksonburg Limestone

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(Kmmel, 1908; Miller, 1937) - Upper part is medium- to dark-gray, laminated to thin-bedded shaly limestone and less abundant medium-gray arenaceous limestone containing quartz-sand lenses. Upper part thin to absent to northeast. Lower part is interbedded medium- to dark-gray, fine- to medium-grained, very thin to medium-bedded fossiliferous limestone and minor medium- to thick-bedded dolomite-cobble conglomerate having a limestone matrix. Unconformable on Beekmantown Group and conformable on the discontinuous sequence at Wantage in the Paulins Kill area. Contains conodonts of North American midcontinent province from Phragmodus undatus to Aphelognathus shatzeri zones of Sweet and Bergstrom (1986). Thickness ranges from 41 to 244m (135-800 ft).
State New Jersey
Name Jacksonburg Limestone
Geologic age Middle Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)Upper part is medium- to dark-gray, laminated to thin-bedded shaly limestone and less abundant medium-gray arenaceous limestone containing quartz-sand lenses. Lower part is interbedded medium- to dark-gray, fine- to medium-grained, very thin to medium-bedded fossiliferous limestone.
Minor
Sedimentary > Clastic > Conglomerate (Bed)medium- to thick-bedded dolomite-cobble conglomerate having a limestone matrix.
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

Kmmel, H.B., 1908, Paleozoic sedimentary rocks of the Franklin Furnace quadrangle, New Jersey: in Spencer, A.C., Kmmel, H.B., Salisbury, R.D., Wolff, J.E., and Palache, Charles, Description of the Franklin Furnace quadrangle, New Jersey: U.S. Geological Survey Geologic Atlas Folio 161, p. 10-12.

https://pubs.er.usgs.gov/publication/gf161

Sweet, W.C., and Bergstrom, S.M., 1986, Conodonts and biostratigraphic correlation: Annual Review of Earth and Planetary Science, v. 14, p. 85-112.

Miller, R.L., 1937, Stratigraphy of the Jacksonburg Limestone: Geological Society of America Bulletin, v. 48, no. 11, p. 1687-1717.
NGMDB product
Counties Hunterdon - Sussex - Warren