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High-Resolution Geologic Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts

Title Page / Table of Contents / List of Figures / Introduction / Maps / Data Collection/Processing / Interpretation / Acknowledgments / Appendix 1 / Appendix 2 / Appendix 3 / Appendix 4


Fig. 4.7. Maps of seafloor topography and backscatter intensity  in Nahant Bay and approaches. Fig. 4.7. Maps of seafloor topography and backscatter intensity  in Nahant Bay and approaches. Fig. 4.7. Maps of seafloor topography and backscatter intensity  in Nahant Bay and approaches.

Figure 4.7. Maps of seafloor topography (upper left) and backscatter intensity (upper right) in Nahant Bay and approaches. Both maps are overlain on NOAA-NOS nautical chart #13275. Contour interval is 2 m. See figure 4.4 for location of maps. Dashed lines show boundaries of physiographic zones, which are based on seafloor topography and dominant substrate properties. Bottom photographs A-C (middle) and seismic-reflection profile (bottom) are indicated by yellow circles and line, respectively. The distance across the bottom of the photographs is approximately 50 cm.


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