The geological history of the surficial units of the Millsboro Quadrangle and
Delaware portion of the Whaleysville Quadrangle was the result of deposition of the
Beaverdam Formation during the late Pliocene and its subsequent modification by
erosion and deposition related to sea-level fluctuations during the Pleistocene and late
Pleistocene upland swamp and bog deposition. The geology at the land surface was then
further modified by periglacial activity that produced dune deposits and Carolina Bays in
the map area. Surficial geologic mapping was conducted using field maps at a scale of
1:12,000 with 2 foot contours. Stratigraphic boundaries drawn at topographic breaks
reflect detailed mapping using contours not shown on this map.
Please give proper credit to the Delaware Geological Survey.
Ramsey, K.W., and Tomlinson, J.L., 2014, Geologic map of the Millsboro and Whaleysville Quadrangles, Delaware: Delaware Geological Survey Geologic Map Series No. 20, scale 1:24,000.
Ramsey, K.W. and Tomlinson, J.L. , 2014, Geologic Map of the Millsboro and Whaleysville Quadrangles, Delaware: Delaware Geological Survey Geologic Map 20, scale 1:1:24,000 1 pp.
Delaware Geological Survey
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Newark, DE 19716
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