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GM12 Geology of the Lewes and Cape Henlopen Quadrangles, Delaware

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GM12 Geology of the Lewes and Cape Henlopen Quadrangles, Delaware
Publication Type:
Geologic Map
Publication Date:
Sep 2003
Ramsey, K.W.

The surficial geology of the Lewes and Cape Henlopen quadrangles reflects the geologic history of the Delaware Bay estuary and successive high and low stands of sea levels during the Quaternary. The subsurface Beaverdam Formation was deposited as part of a fluvial-estuarine system during the Pliocene, the sediments of which now form the core of the Delmarva Peninsula. Following a period of glacial outwash during the early Pleistocene represented by the Columbia Formation found to the northwest of the map area (Ramsey, 1997), the Delaware River and Estuary developed their current positions. The Lynch Heights and Scotts Corners Formations (Ramsey, 1993, 1997, 2001) represent shoreline and estuarine deposits associated with high stands of sea level during the middle to late Pleistocene on the margins of the Delaware Estuary. In the map area, the Lynch Heights Formation includes relict spit and dune deposits at the ancestral intersection of the Atlantic Coast and Delaware Bay systems, similar in geomorphic position to the modern Cape Henlopen.

Coverage Area
Use Constraints

Please give proper credit to the Delaware Geological Survey.

Ramsey, K.W., 2003, Geology of the Lewes and Cape Henlopen Quadrangles, Delaware: Delaware Geological Survey Geologic Map 12 , scale 1:24,000.

Contact Info

Delaware Geological Survey
Phone: (302)-831-2833
Fax: (302)-831-3579

University of Delaware
Delaware Geological Survey Building
Newark, DE 19716
Mon - Fri; 8:00am to 4:30pm

Additional Notes

Map Scale 1:24,000.
Centroid: 38.81, -75.13