Figure 5. Side-scan sonar image of The Narrows area of Somes Sound. Upper panel shows a profile of the seafloor and a shallow area (near arrow) that forms a sill at The Narrows. The lower panel is a plan view (looking down from the sea surface) at boulders that cover the sill. Boulders and gravel dominate the seafloor of this area (modified from Barnhardt and Kelley, 1995).
Last updated on October 6, 2005