Figure 12. Map showing interpretations of sea-floor features in the National Oceanic and Atmospheric Administration survey H12296 study area. Features discernible on the sea floor include sand waves (and megaripples), scour depressions and erosional outliers, boulders, and trawl marks. Areas that are not outlined are predominately modern marine sediment. Interpretations are based on multibeam bathymetry, sidescan sonar, sediment samples, and bottom photography (both still and video).