|Name||Coeymans Formation, Kalkberg Limestone, Coeymans Limestone, Manlius Limestone, undivided|
|Geologic age||Lower Devonian|
Sedimentary > Carbonate > Limestone (Bed)Coeymans Formation - medium-light-gray, fine- to coarse-grained calcareous sandstone and medium-gray, fine- to coarse-grained, medium- to thick-bedded, locally irregularly-bedded, argillaceous to arenaceous limestone; grades downward into medium-gray, fine-grained, argillaceous and arenaceous limestone. Kalkberg Limestone - medium-gray-weathering, medium-dark-gray, fine-grained, very thin to massively bedded fossiliferous limestone. Grades downward into fine- to medium-grained, thin-bedded, fossiliferous argillaceous limestone. Coeymans Limestone - medium-gray weathering, medium-dark-gray, fine-to-coarse-grained, medium- to massively bedded fossiliferous limestone and local argillaceous limestone lenses. Manlius Limestone - medium-gray weathering, medium-dark- to dark-gray, very fine to fine-grained, unevenly bedded fossiliferous limestone. Some local medium-grained limestone, yellowish-gray shale partings and biostromes.
Sedimentary > Clastic > Sandstone (Calcareous)Coeymans Formation - medium-light-gray, fine- to coarse-grained calcareous sandstone; local beds of fine- to coarse-grained pebbly calcareous sandstone.
Sedimentary > Chemical > Chert (Bed, Lens)Coeymans Formation - nodules of black chert. Kalkberg Limestone - nodules and lenses of dark-gray chert.
|Comments||Helderberg Group (Lower Devonian and Upper Silurian). Note: map symbol for this unit on printed and digital map is Dkc, but on digital map description, only Dc is used. Dkc was used to correspond with printed and 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.
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.
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Vanuxem, Lardner, 1840, Fourth annual report of the geological survey of the third district: New York Geological Survey Annual Report 4, p. 355-383.