|Lower Potomac Group, Eastern Coastal Plain of Maryland, Delaware, and New Jersey
Several researchers reported that salinities for the lower Potomac aquifer interval of eastern New Jersey, Delaware, and Maryland (Manheim and Horn, 1968; Hansen, 1984; Trapp and others, 1984; Meisler, 1989; Trapp and Horn, 1997; Pope and Gordon, 1999). We combined information presented by Hansen (1984) and Pope and Gordon (1999) for the GIS.
Hansen, H. J., 1984, Hydrogeologic characteristics of the Waste Gate Formation, a new subsurface unit of the Potomac Group underlying the eastern Delmarva Peninsula: Maryland Geological Survey Information Circular 39, 22 p.
Pope, D. A., and Gordon, A. D., 1999, Simulation of ground-water flow and movement of the freshwater-saltwater interface in the New Jersey coastal plain: U.S. Geological Survey Water-Resources Investigations Report 98-4216, 159 p.