Figure 13. Detailed sidescan-sonar image of the southeastern part of the study area showing boulders, sand waves, and benches. Boulders are visible as high-backscatter targets with low-backscatter shadows. Higher backscatter (lighter tones) in the center of the image represents coarser grained sediment; lower backscatter (darker tones) represents finer grained sediment. Location of figure shown in fig. 2.