Scientific Investigations Map 3055
Prepared in cooperation with the City of Jacksonville, Onslow Water and Sewer Authority, and U.S. Marine Corps, Camp Lejeune
This report is available online only in pdf format (2.8 MB): Scientific Investigations Map 3055
Note: This report is a poster that is 32 inches wide by 32 inches high.
By Jason M. Fine
U.S. Geological Survey Scientific Investigations Map 3055, 1 sheet (Published December 2008)
The unconsolidated sediments that underlie the Onslow County area are composed of interlayered permeable and impermeable beds, which overlie the crystalline basement rocks. The aquifers, composed mostly of sand and limestone, are separated by confining units composed mostly of clay and silt. The aquifers from top to bottom are the surficial, Castle Hayne, Beaufort, Peedee, Black Creek, and Upper and Lower Cape Fear aquifers. For this study, the Castle Hayne aquifer is informally divided into the upper and lower Castle Hayne aquifers.
The eight aquifers and seven confining units of the Tertiary and Cretaceous strata beneath Onslow County are presented in seven hydrogeologic sections. The hydrogeologic framework was refined from existing interpretations by using geophysical logs, driller’s logs, and other available data from 123 wells and boreholes.
Abstract
Introduction
Study Area
Methods
Surficial Aquifer
Upper and Lower Castle Hayne Aquifers
Beaufort Aquifer
Peedee Aquifer
Black Creek Aquifer
Upper and Lower Cape Fear Aquifers
Summary
References
Suggested citation:
Fine, J.M., 2008, Hydrogeologic framework of Onslow County, North Carolina, 2008: U.S. Geological Survey Scientific Investigations Map 3055, 1 sheet. (available online at http://pubs.usgs.gov/sim/3055/)
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://pubs.usgs.gov/sim/3055/index.html
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