Tracing the continuity of pleistocene aquifers in northern New Jersey by seismic methods

Seismic refraction measurements were used to draw a new bedrock contour map in Morris County, New Jersey, where the major ground‐water supplies are found in Quaternary sand and gravel deposits filling pre‐Pleistocene channels. Aquifer performance tests aided in tracing the continuity of the Quaternary aquifers in these channels. In one case, the lack of continuity between two wells substantiated the seismic prediction that two separate channels were involved. The success of the seismic exploration emphasizes the value of using such methods, so that test drilling can be devoted to exploring the more favorable areas for production wells.