Hydrogeologic Framework of Onslow County, North Carolina, 2008

Scientific Investigations Map 3055
Prepared in cooperation with the City of Jacksonville, Onslow Water and Sewer Authority, and U.S. Marine Corps, Camp Lejeune



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.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Hydrogeologic Framework of Onslow County, North Carolina, 2008
Series title Scientific Investigations Map
Series number 3055
DOI 10.3133/sim3055
Edition -
Year Published 2008
Language ENGLISH
Publisher U.S. Geological Survey
Contributing office(s) North Carolina Water Science Center
Description Map Sheet: 32 x 32 inches
Time Range Start 2008-01-01
Time Range End 2008-12-31
Online Only (Y/N) Y
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details