This map shows the saturated thickness of the water-table aquifer. This aquifer consists of the deposits of the Columbia Formation and those portions of the Magothy and Englishtown-Mt. Laurel formations, and Rancocas Group that are hydraulically connected with the Columbia deposits (see Groot, Demicco, and Cherry, 1983). For example, large, saturated thicknesses in the zone trending northeast-southwest near Townsend reflect the addition of the sands of the Rancocas Group to the total thickness of the sands of the overlying Columbia Formation.
Please give proper credit to the Delaware Geological Survey.
Groot, J.J., Demicco, P.M., Cherry, P.J., 1983, Saturated Thickness of the Water-Table Aquifer in Southern New Castle County, Delaware: Delaware Geological Survey Open File Report R2,
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