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Open-File Report 2011–1115

Prepared in Cooperation With the North Carolina Geological Survey

Detailed Sections From Auger Holes in the Elizabethtown 1:100,000-Scale Quadrangle, North Carolina

By Robert E. Weems, William C. Lewis, Joseph H. Murray, David B. Queen, Jeffrey B. Grey, and Benjamin D. DeJong

Thumbnail of and link to report PDF (3.9 MB)Abstract

The Elizabethtown 1:100,000 quadrangle is in the west-central part of the Coastal Plain of southeastern North Carolina. The Coastal Plain, in this region, consists mostly of unlithified sediments that range in age from Late Cretaceous to Holocene. These sediments lie with profound unconformity on complexly deformed metamorphic and igneous rocks similar to rocks found immediately to the west in the Piedmont province. Coastal Plain sediments generally dip gently to the southeast or south and reach a maximum thickness of about 850 feet (ft) in the extreme southeast part of the map area. The gentle southerly and southeasterly dip is disrupted in several areas by faulting.

The U.S. Geological Survey recovered one core and augered 196 research test holes in the Elizabethtown 1:100,000 quadrangle to supplement sparse outcrop data in the map area. The recovered sediments were studied and data from these sediments recorded to determine the lithologic characteristics, spatial distribution, and temporal framework of the represented Coastal Plain stratigraphic units. These test holes were critical for accurately determining the distribution of major geologic units and the position of unit boundaries. The detailed descriptions of the subsurface data can be used by geologists, hydrologists, engineers, and community planners to provide a detailed shallow-subsurface stratigraphic framework for the Elizabethtown map region.

First posted July 26, 2011

For additional information contact:
Chief, Eastern Geology and Paleoclimate Science Center
U.S. Geological Survey
12201 Sunrise Valley Drive, MS 926A
Reston, VA 20192

 

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Suggested citation:

Weems, R.E., Lewis, W.C., Murray, J.H., Queen, D.B., Grey, J.B., and DeJong, B.D., 2011, Detailed sections from auger holes in the Elizabethtown 1:100,000-scale map sheet, North Carolina: U.S. Geological Survey Open-File Report 2011–1115, 286 p. Available only online at https://pubs.usgs.gov/of/2011/1115.



Contents

Introduction

Methods

Stratigraphy

Structural Geology

Hydrogeology

Acknowledgments

References Cited

Appendix 1. Locality Descriptions and Detailed Lithologic Logs

Appendix 2. Supplementary Basement Data

Appendix 3. Fossil Mollusk and Vertebrate Taxa Recovered in the Elizabethtown 1:100,000-Scale Quadrangle

Appendix 4. Upper Cretaceous Fossil Vertebrate Taxa Reported by Miller (1966, 1967, 1968), Baird and Horner (1979), and Robb (1989) From Phoebus Landing in the Elizabethtown 1:100,000-Scale Quadrangle


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