On March 2, 1975, the U.S. Geological Survey completed a series
of geophysical well logs in the Charleston Project Deep Core Hole No.
1 located at Latitude 32° 53.2 'N and Longitude 80° 21 . 5'W in Dorchester
County near Charleston, South Carolina. The land surface is at an
elevation of 5.4 m (18 ft) above mean sea level. The total depth of
the test hole is 793 m (2,600 ft) and the geophysical logs were recorded through fresh barite mud to the bottom. The deep geologic. test
hole penetrated the entire section of Atlantic Coastal Plain sediments
and extended about 40 m (130 ft) into basement rock composed of basalt
The purpose of the logging is to assist in the interpretation of
the depositional environments, stratigraphy, structural, and geological
history of the onshore and offshore areas surrounding Charleston, S.C.
The purpose of this report is to make the uninterpretated geophysical
recordings of the entire log suite publicly available .
The logs available are shown in table 1, along with the operating
depth intervals, total footage, scale, units of measure, combination log,
and other pertinent data.
Geophysical logs from a geologic test hole near Charleston, South Carolina