Figure 16. Detailed multibeam-bathymetric image of the western bathymetric depression and the ridges of cobbles along its eastern and northern sides. Sand waves and megaripples can also be seen in the image. Some of the cobble ridges have barchanoid shapes. The northern section of cobble ridges connects to a moraine located to the west of the study area and is thought to be an extension of it. Location of image is shown in figure 13.