Lake Passaic - Discovery

Discovery

The discovery of Glacial Lake Passaic is credited to Professor George Hammell Cook, once the State Geologist of New Jersey and Vice President of Rutgers University. Cook’s first official mention of the lake was in the New Jersey Annual Report of the State Geologist for the Year 1880, in which he described flat-topped hills and drift-like deposits in the upper Passaic Valley that appeared to be created or modified by the waters of a lake. Twelve years later, field research conducted under State Geologist John C. Smock began to uncover wave-cut terraces and other shoreline features that more conclusively established the lake’s existence. However, the boundaries of the lake were not completely understood until the following year, 1893, when geologists Rollin D. Salisbury and Henry B. Kümmel completed a study of wave cut terraces, shoreline platforms, and delta deposits within the central and upper Passaic basin. The study was used to create a report, Lake Passaic – An Extinct Glacial Lake, which was included in the New Jersey Annual Report of the State Geologist for the Year 1893.

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