alluvium and swamp deposits
GM18 Geologic Map of the Bethany Beach and Assawoman Bay Quadrangles, Delaware
The geologic history of the surficial units of the Bethany Beach and Assawoman Bay Quadrangles is that of deposition of the Beaverdam Formation and its subsequent modification by erosion and deposition related to sea-level fluctuations during the Pleistocene. The geology reflects this complex history onshore, in Indian River Bay and Assawoman Bay, and offshore in the Atlantic Ocean.
HM5 Geohydrology of the Northern Coastal Area, Delaware
Geology and hydrology of the Northern Coastal Area, Delaware. There are 2 sheets in the series.
GM14 Geologic Map of Kent County, Delaware
This map shows the surficial geology of Kent County, Delaware at a scale of 1:100,000. Maps at this scale are useful for viewing the general geologic framework on a county-wide basis, determining the geology of watersheds, and recognizing the relationship of geology to regional or county-wide environmental or land-use issues. This map, when combined with the subsurface geologic information, provides a basis for locating water supplies, mapping ground-water recharge areas, and protecting ground and surface water.