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Digital elevations and extents of regional hydrogeologic units in the Northern Atlantic Coastal Plain aquifer system


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Pope, J.P., Andreasen, D.C., McFarland, E.R., and Watt, M.K., 2016, Digital elevations and extents of regional hydrogeologic units in the Northern Atlantic Coastal Plain aquifer system from Long Island, New York, to North Carolina (ver. 1.1, January 2021): U.S. Geological Survey data release,


A digital model of the sedimentary Northern Atlantic Coastal Plain aquifer system is composed of 20 rasters and hydrogeologic unit extent polygons. Rasters describe the top elevations of regional aquifers and confining units at a resolution of 2640 feet (1/2 mile). The rasters are clipped to the extent polygons, which represent the spatial extents of the hydrogeologic units onshore and several miles offshore. This three-dimensional hydrogeologic model was constructed as part of a U.S. Geological Survey Groundwater Resources Program study of groundwater availability in the Northern Atlantic Coastal Plain (NACP) aquifer system, including parts of New York, New Jersey, Delaware, Maryland, Virginia, and North Carolina. Digital elevations [...]

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The hydrogeologic-unit elevations included in this regional compilation incorporate the work of many geologists and hydrologists and span more than a century of investigation. The unit extents and elevations included here were constructed to support regional analysis of the groundwater flow system and are appropriately used only at this scale because of the assumptions, approximations, and generalizations necessary for regional analysis. Individual referenced studies and data should be used for investigations at the local and state levels. The DEM was assembled to provide a consistent model of the land surface and estuary-/bay-/sea-bottom surface to represent the upper limit of the NACP aquifer system from its western limit in the Fall Zone to the edge of the Atlantic continental shelf in the east, and from Long Island New York in the north to the Pamlico River and Pamlico Sound of North Carolina in the south. It may be useful for other applications requiring a digital elevation model continuous over this large area and continuous across the onshore (emergent) and offshore (submerged) extent of the NACP.

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DOI doi:10.5066/F70V89WN

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