Minisink Limestone and New Scotland Formation, undivided

Minisink Limestone (Epstein and others, 1967) - Light-medium-gray-weathering, medium-gray, fine-grained, medium-bedded, partly massive, argillaceous fossiliferous limestone. Some nodules and lenses of purer limestone occur locally. Lower contact gradational. Thickness uniformly 7 m (23 ft). New Scotland Formation (Clarke and Schuchert, 1899) - Upper part is dark-gray, very fine grained, laminated to thin-bedded siliceous shale containing pods of medium-dark-gray, very fine grained limestone; scattered thin beds and lenses of medium-gray, fine-grained argillaceous fossiliferous limestone; and small dark-gray chert nodules. Lower part is medium-dark-gray, thin-bedded, siliceous, fossiliferous calcareous shale. Contains thin beds and lenses of medium-gray, fine-grained, highly fossiliferous, argillaceous limestone containing nodules, lenses and, locally, irregular beds of dark-gray chert. Lower contact abrupt and placed at top of calcareous quartz sandstone. Total thickness is approximately 23 m (75 ft).
State New Jersey
Name Minisink Limestone and New Scotland Formation, undivided
Geologic age Lower Devonian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)Minisink Limestone - Light-medium-gray-weathering, medium-gray, fine-grained, medium-bedded, partly massive, argillaceous fossiliferous limestone. Some nodules and lenses of purer limestone occur locally. New Scotland Formation - Upper part pods of medium-dark-gray, very fine grained limestone; scattered thin beds and lenses of medium-gray, fine-grained argillaceous fossiliferous limestone; lower part contains thin beds and lenses of medium-gray, fine-grained, highly fossiliferous, argillaceous limestone.
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed, Calcareous)New Scotland Formation - Upper part is dark-gray, very fine grained, laminated to thin-bedded siliceous shale. Lower part is medium-dark-gray, thin-bedded, siliceous, fossiliferous calcareous shale.
Incidental
Sedimentary > Chemical > Chert (Bed)New Scotland Formation - Upper part, small dark-gray chert nodules. Lower part, nodules, lenses and, locally, irregular beds of dark-gray chert.
Comments Helderberg Group (Lower Devonian and Upper Silurian)
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

Epstein, A.G., Epstein, J.B., Spink, W.J., and Jennings, D.S., 1967, Upper Silurian and Lower Devonian stratigraphy of northeastern Pennsylvania, New Jersey, and southeasternmost New York: U.S. Geological Survey Bulletin 1243, 74 p.

https://pubs.er.usgs.gov/publication/b1243

Clarke, J.M., and Schuchert, Charles, 1899, The nomenclature of the New York series of geological formations: Science, new series, v. 10, p. 874-878.

NGMDB product
Counties Sussex