Figure 14. Detailed planar view of the sun-illuminated bathymetry from the combined National Oceanic and Atmospheric Administration surveys in Rhode Island and Block Island Sounds showing a deep isolated scour depression in a channel south of the eastern end of Fishers Island. The depression is more than 101 m deep and has been eroded into glaciolacustrine sediments underlying this part of Block Island Sound. Location of view is shown in figure 11. Warmer colors denote shallower areas; cooler colors denote deeper areas. Depth key is shown in figure 9.