Geological Survey of New Jersey. Atlas Sheet 20 (Geologic) (1889) Geological Survey of New Jersey. Annual Report of the State Geologist 1887 Companion text: Topographic survey / Cornelius Clarkson Vermeule. Annual report of the State Geologist for the year 1887 / George H. Cook. Trenton, NJ : Geological Survey of New Jersey. Annual Report 1887. 1887. 10-19pp. 1fig. See also: Annual report of the State Geologist for the year 1888 / George H. Cook. Camden, NJ: Geological Survey of New Jersey. Annual Report 1888. 1889. 7-9pp. In upper margin: Geological Survey of New Jersey. Atlas sheet no. 20. Litographed by Julius Bien & Co., NY.