Pg. 2 (fig. 1), 19-20, 61-63, pl. 1. Depue Limestone Member of Coeymans Formation of Helderberg Group. Consists of medium-gray to medium-dark-gray, dominantly fine-grained, slightly argillaceous and arenaceous, fairly evenly bedded limestone that weathers medium-light-gray. Member present in Pennsylvania and New Jersey. Thickness 13 feet at its type section southwest of Shawnee; 29 feet at Wallpack Center, New Jersey. Southwest of Bevans, New Jersey, underlies abruptly or gradationally the Peters Valley Member (new). Northeast of Bevans, grades upward into Shawnee Island Member (new). Overlies Mashipacong Member (new) of Rondout Formation. In vicinity of Montague, New Jersey, grades laterally into Thacher Member of Manlius Limestone. Members are separated by an arbitrary cutoff between Montague and Hainesville in order to facilitate mapping. Contains brachiopods, ostracodes, tentaculitids, and stromatoporoid and coral fragments. Age is Early Devonian. Report includes measured sections. (Depue Limestone Member of Coeymans Formation of Helderberg Group adopted by the USGS.)
Type section: in cut along northwest side of road, 0.6 mi southwest of Shawnee on Delaware, in southwest corner of Bushkill 7.5-min quadrangle [approx. Lat. 41 deg. 0.5 min. N., Long. 75 deg. 6.92 min. W., Monroe Co., PA (A.G. Harris, written commun., ca. 1995)]. Named from Depue Island in the Delaware River, [east of Shawnee on Delaware], in Monroe Co., PA. [Not to be confused with Depew Island in Delaware River, which is to the north in New Jersey.]
[Misprint: US geologic names lexicon (USGS Bull. 1350, p. 205) states "…grades laterally into Thacher Member of Coeymans Formation." Should be Thacher Member of Manlius Limestone.]

Source: Publication; US geologic names lexicon (USGS Bull. 1350, p. 204-205); GNU records (USGS DDS-6; Reston GNULEX); Changes in stratigraphic nomenclature, 1967 (USGS Bull. 1274-A, p. A7).

Coeymans Formation in map area consists of the Depue Limestone Member, the Shawnee Island Member, and the Stormville Member, though they are not separately mapped. The basal Depue, throughout the map area, consists of medium-dark-gray, very fine- to fine-grained limestone, thin- to medium-bedded, massive to flaggy. All units are fossiliferous. Lower contact with Rondout Formation is abrupt and marked by first occurrence of argillaceous limestone. Age is Early Devonian.

Source: GNU records (USGS DDS-6; Reston GNULEX).