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U.S. Geological Survey Open-File Report 2011-1184

High-Resolution Geophysical Data From the Sea Floor Surrounding the Western Elizabeth Islands, Massachusetts

Skip past navigation menu to main textTitle Page / Contents / List of Figures / Conversion Factors and Datum / Abstract / Introduction / Data Collection and Processing / Acknowledgments / References Cited / Appendix

Figure 6 . Map showing acoustic-backscatter intensity of the seafloorsurrounding the western Elizabeth Islands. Backscatter intensity is an acoustic measure of the hardness and roughness of the seafloor. In general, higher values (light tones) represent rock, boulders, cobbles, gravel, and coarse sand. Lower values (dark tones) generally represent fine sand and muddy sediment.

Figure 6. Map showing acoustic-backscatter intensity of the sea floorsurrounding the western Elizabeth Islands, Massachusetts. Backscatter intensity is an acoustic measure of the hardness and roughness of the sea floor. In general, higher values (light tones) represent rock, boulders, cobbles, gravel, and coarse sand. Lower values (dark tones) generally represent fine sand and muddy sediment.

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