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Multibeam mapping of the Pinnacles region, Gulf of Mexico

March 1, 2002

Recent USGS mapping shows an extensive deep (~100 m) reef tract occurs on the Mississippi-Alabama outer continental shelf (Figure 1). The tract, known as "The Pinnacles", is apparently part of a sequence of drowned reef complexes along the "40-fathom" shelf edge of the northern Gulf of Mexico (Ludwick and Walton, 1957). It is critical to determine the accurate geomorphology of these deep-reefs because of their importance as benthic habitats for fisheries. The Pinnacles have previously been mapped using a single-beam echo sounder (Ludwick and Walton,1957), sidescan sonar (Laswell et al., 1990), and the TAMU2 towed single-beam sidescan-sonar system (Anonymous, 1999). These existing studies do not provide the quality of geomorphic data necessary for reasonable habitat studies.

Publication Year 2002
Title Multibeam mapping of the Pinnacles region, Gulf of Mexico
DOI 10.3133/ofr026
Authors James V. Gardner, Peter Dartnell, Kenneth J. Sulak
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 2002-6
Index ID ofr026
Record Source USGS Publications Warehouse
USGS Organization Pacific Coastal and Marine Science Center