Geologic Map of the Bethany Beach and Assawoman Bay Quadrangles, Delaware
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Newark, DE: Delaware Geological Survey, University of Delaware
Abstract
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. Erosion during the late Pleistocene sea-level lowstand and ongoing deposition offshore and in Indian River Bay during the Holocene rise in sea level represents the latest of several cycles of erosion and deposition.
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Bethany Beach, Fenwick Island, Sussex County, Indian River Inlet, geologic map, alluvial deposits, alluvium and swamp deposits, Atlantic Coastal Plain, barrier washover deposits, beach deposits, Beaverdam Formation, Bethany Formation, Carolina Bay deposits, coastal geology, dredge disposal deposits, dune deposits, dune washover, fill, finger shoal deposits, lagoon deposits, Lynch Heights Formation, marine deposits, marsh and tidal deposits, marsh deposits, nearshore deposits, Quaternary Period, sheetsand deposits, shoreline deposits, Sinepuxent Formation, STATEMAP, surficial geology