Geologic Map of the Wyoming Quadrangle, Delaware
Date
2024-11
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Publisher
Newark, DE: Delaware Geological Survey, University of Delaware
Abstract
Geologic mapping was conducted at 1:12,000 with a 1-ft topographic contour basemap. Some stratigraphic boundaries drawn at topographic breaks and highs reflect detailed mapping using LiDAR data. Elevations of stratigraphic contacts along stream valleys are projected from subsurface data. Except for a few erosional bluffs, these contacts are covered by colluvium. Carolina Bay features were visually identified using a hillshade digital elevation model (DEM) generated from 2014 LiDAR data and were mapped by digitizing their outline, including their rim. In areas where Carolina Bays occurred in clusters and individual bays could not be differentiated, the outline of the entire cluster was mapped. This map supersedes Geology of the South-Central Kent County Area, Delaware: Delaware Geological Survey Geologic Map Series No. 7 (Pickett and Benson, 1986) and Geologic Map of Kent County, Delaware: Delaware Geological Survey Geologic Map Series No. 14 (Ramsey, 2007).
The geological history of the surficial units of the Wyoming Quadrangle is the result of erosion of the Calvert, Choptank, and Beaverdam Formations by glacial dam burst events during the early Pleistocene. These periods of erosion were followed by fluvial and estuarine deposition associated with multiple sea-level fluctuations during the middle to late Pleistocene. Periglacial activity that followed produced Carolina Bay deposits and freeze-thaw features on the land surface.
Description
Keywords
carolina bays, modified land, Wyoming Delaware