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U.S. Geological Survey Open-File Report 2013–1003

Sea-Floor Geology in Northeastern Block Island Sound, Rhode Island

Skip past contents information Title | List of Figures | Conversion Factors | Abstract | Introduction | Setting | Methods | Bathymetry | Sidescan Sonar | Sediments | Bottom Photography | GIS Data Catalog | Summary | Acknowledgments | References | Contacts | Index

Figure 17. Image of sidescan sonar from the northern part of the study area.

Figure 17. Detailed sidescan-sonar image of boulders and scour depressions along the northern edge of the study area. Boulders are visible as white targets with black shadows. Scour depressions are represented by light tones and are coarser grained than the surrounding finer grained sea floor, which is represented by dark tones. Stripes oriented along survey tracklines are artifacts of the data acquisition and processing. Location shown in figure 12.

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