|Name||Rondout and Decker Formations, undivided|
|Geologic age||Lower Devonian and Upper Silurian|
Sedimentary > Carbonate > Limestone (Bed)Rondout Formation - Upper part is medium-gray weathering, medium-dark-gray, very fine to fine-grained, medium-bedded, fossiliferous, argillaceous limestone. Lower part is medium-gray-weathering, medium- to dark-gray, very fine to medium-grained, medium-bedded fossiliferous limestone. Decker Formation - locally interbedded with fossiliferous medium-gray, medium- to coarse-grained limestone.
Sedimentary > Clastic > Conglomerate (Bed)Decker Formation - Light-gray- to yellowish-gray-weathering, light- to medium-gray fine-pebble conglomerate.
Sedimentary > Clastic > Siltstone (Bed, Calcareous)Decker Formation - Light-gray- to yellowish-gray-weathering, light- to medium-gray, calcareous quartz siltstone.
Sedimentary > Clastic > Sandstone (Bed, Calcareous)Decker Formation - Light-gray- to yellowish-gray-weathering, light- to medium-gray, calcareous sandstone.
Sedimentary > Carbonate > Dolostone (Bed)Rondout Formation - middle part is light-medium-gray-weathering, medium-gray, laminated to medium-bedded, argillaceous dolomite. Decker Formation - very fine grained, thin- to medium-bedded dolomite.
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.
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.
Denkler, K.E., and Harris, A.G., 1988, Conodont-based determination of the Silurian-Devonian boundary in the Valley and Ridge Province, Northern and Central Appalachians, in Sando, W.J., Contributions to paleontology and stratigraphy: U.S. Geological Survey Bulletin 1837, p. B1-B13.
White, I.C., 1882, The geology of Pike and Monroe Counties: Pennsylvania Geological Survey, 2nd series, Report G-6, 407 p.