Figure
15. Sidescan-sonar image showing wisps of presumed coarser sand (higher backscatter
lighter tones) surrounded by lower backscatter (darker tones) finer grained
sediment. Detail of sidescan-sonar image (lower right) shows the high-backscatter
wisps, and the bottom photograph (lower left) is taken from the sample location
shown on the sidescan-sonar detail. Pie diagrams show the amount of sand (yellow)
versus mud (purple) in the surface grab samples. Click on the figure to view a
larger image. Figure location shown in Fig. 4.