Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>A number of studies present cross sections that include geophysical logs (gamma ray, spontaneous potential, resistivity) that can be used to derive a semiquantitative estimate of net sand thickness in the lower Potomac aquifer (Hansen, 1968; Brown and others, 1972; Cushing and others, 1973; Trapp and others, 1984). Anderson (1948) and Benson and others (1985) provided grain-size analysis results from cores that can also be used to evaluate net sand thickness in the lower Potomac aquifer. Otton and Mandle (1984) and Hansen (1984) provided information regarding areal distribution of sands within the Potomac Group, and these data were digitized</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Copyright Text: 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.
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Otton, E. G., and Mandle, R. J., 1984, Hydrogeology of the upper Chesapeake Bay area, Maryland with emphasis on aquifers in the Potomac Group: Maryland Geological Survey Report of Investigations No. 39, 62 p.