A Surficial Hydrogeologic Framework for the Mid-Atlantic Coastal Plain

Professional Paper 1680
By: , and 



A surficial hydrogeologic framework was developed for the Mid-Atlantic Coastal Plain, from New Jersey through North Carolina. The framework includes seven distinct hydrogeologic subregions within which the primary natural physical factors affecting the flow and chemistry of shallow ground water and small streams are relatively consistent. Within most subregions, the transport of chemicals from the land surface to ground water and streams can be described by a fairly uniform set of natural processes; some subregions include mixed hydrogeologic settings that are indistinguishable at the regional scale. The hydrogeologic framework and accompanying physiographic and geologic delineations are presented in digital and printed format.

The seven hydrogeologic subregions that constitute the framework were delineated primarily on the basis of physiography and the predominant texture (typical grain size) of surficial and (where surficial sediments are particularly thin) subcropping sediments. Physiography for the Mid-Atlantic Coastal Plain was constructed by standardizing and extrapolating previously published interpretations for the Coastal Plain of South Carolina and New Jersey, based on similar work in the other States. Surficial and subcropping geology were similarly compiled from previous publications by resolving inconsistencies in nomenclature, interpretation, and scale, and interpolating across unmapped areas. A bulk sediment texture was determined for each mapped geologic unit on the basis of published descriptions.

Fundamental differences among the seven hydrogeologic subregions are described on the basis of hypotheses about surficial and shallow subsurface hydrology and water chemistry in each, as well as variable land use, soils, and topography. On the regional scale, the Coastal Lowlands (Subregion 1), the Middle Coastal Plain - Fine Sediments (Subregion 3), the Middle Coastal Plain - Sands with Overlying Gravels (Subregion 4), and the Inner Coastal Plain - Upland Sands and Gravels (Subregion 5) are relatively homogeneous in terms of hydrogeology, although an examination of results from small-scale studies within the Coastal Plain demonstrates that even these areas are quite variable, locally. Moderate topographic relief and primarily permeable surficial sediments promote good drainage of the land surface in Subregion 4, for example, but drainage is commonly poor in the Coastal Lowlands (Subregion 1) due to flat topography and low elevations. Agriculture is common in both subregions, although artificial drainage is typically required to support cultivation in Subregion 1. Important physiographic differences are evident among the remaining three subregions, although sediment textures within the Middle Coastal Plain - Mixed Sediment Texture (Subregion 2), the Inner Coastal Plain - Dissected Outcrop Belt (Subregion 6), and the Alluvial and Estuarine Valleys (Subregion 7) are variable even at the regional scale.

Suggested Citation

Ator, S.W., Denver, J.M., Krantz, D.E., Newell, W.L., and Martucci, S.K., 2005, A surficial hydrogeologic framework for the Mid-Atlantic Coastal Plain: U.S., Geological Survey Professional Paper 1680, 44 p., https://doi.org/10.3133/pp1680.

ISSN: 2330-7102 (online)

Study Area

Table of Contents

  • Foreword
  • Abstract
  • Introduction
  • Development of the regional surficial hydrogeologic framework
  • The regional surficial hydrogeologic framework
  • Evaluation of the regional framework at the local scale
  • Framework application
  • Summary
  • References
  • Appendix 1. Technical notes
  • Appendix 2. Geologic setting of the Mid-Atlantic Coastal Plain
Publication type Report
Publication Subtype USGS Numbered Series
Title A surficial hydrogeologic framework for the Mid-Atlantic Coastal Plain
Series title Professional Paper
Series number 1680
ISBN 0607957461
DOI 10.3133/pp1680
Year Published 2005
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Maryland-Delaware-District of Columbia Water Science Center
Description vi, 44 p.
Country United States
State Delaware, Maryland, New Jersey, North Carolina, Virginia
Other Geospatial Mid-Atlantic Coastal Plain
Google Analytic Metrics Metrics page
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