During April and May, 1991, the U.S. Geological
Survey (USGS) drilled a 510-ft-deep, continuously
cored, stratigraphic test hole on Horn Island,
Mississippi Sound, as part of a field study of the
Neogene and Quaternary geology of the Mississippi coastal area.
The USGS drilled two new holes at the Horn
Island site. The first hole was continuously cored to
a depth of 510 ft; coring stopped at this depth due to
mechanical problems. To facilitate geophysical
logging, an unsampled second hole was drilled to a
depth of 519 ft at the same location.
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