USGS Western Region Coastal and Marine Geology

Torresan, M.E., and Gardner, J.V.,2000, Acoustic Mapping of the Regional Seafloor Geology in and Around Hawaiian Ocean Dredged-Material Disposal Sites, U.S. Geological Survey Open-file Report 00-124.

Figure 12 - Multibeam backscatter image comparable in resolution to that collected with single-beam sidescan sonar shown in Figure 13.

Note the high backscatter (bright tones) dredged-material deposits, drowned reefs and volcanic or slump features. Natural sandy sediment is characterized by low-backscatter (dark tones). Sun illumination for land: azimuth 345 degrees; angle 45 degrees. Compare to Plate 4.

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[Fig 12 Oahu Backscatter Map ]

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Maintainer: Susan A. Cochran
Last modified: 13 Dec 2000

U.S. Department of the Interior, U.S. Geological Survey, Western Region Coastal and Marine Geology