Figure 15. Sidescan-sonar imagery, Boomer seismic-reflection profile (O'Hara and Oldale, 1980), and interpretation through an area of tabular erosional outliers. Top image shows location of the seismic profile on the sidescan-sonar data and erosional outliers in the center. Lower images of seismic profile and interpretation show stratified sediments, possibly from a small glacial lake or pond, below the erosional outliers. Note irregular sea floor and estuarine sediments above laminations, likely due to prior erosion of lacustrine sediments. Boulders can be seen rising above the sea floor. Vertical exaggeration: 16X. Depths are based on the assumed compressional wave velocity of 1500 m/s. Figure location is shown in figure 2.