Figure 15. Seismic-reflection profile (Needell and Lewis, 1984; Poppe and others, 2002) and interpretation of a section of line a81_218, which crosses the study area to the east of the eastern bathymetric depressions and through glacial sediments. Unstratified glacial deposits underlie drumlins and are surrounded by laminated glaciolacustrine sediments with overlying modern marine deposits. Location of profile is shown in figure 13.