Figure 14. Detailed multibeam-bathymetric image of the two eastern bathymetric depressions in the study area and the drumlins to their east. The southern depression, Deep Hole, has a steep eastern and northern wall composed of silty clay (see figure 23). The northern depression has gravel and boulders at the bottom and along the eastern wall where it has likely eroded into the nearby glacial drift topped with features we interpret to be drumlins. Location of image is shown in figure 13.