Figure 4. . Trackline map showing locations of Boomer subbottom profiles. Bold sections of tracklines indicate locations of seismic profiles in figure 5, figure 6, figure 11, and figure 12. Boomer tracklines from Oldale and O'Hara (1990) and USGS watergun profiles are shown. Topography is from USGS 3-arc second Digital Elevation Model. Bathymetry is from NOAA Coastal Relief Model (www.ngdc.noaa.gov/mgg/coastal/coastal.html).

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