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U.S. Geological Survey Open-File Report 2015-1153

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Sea-Floor Texture and Physiographic Zones of the Inner Continental Shelf From Salisbury to Nahant, Massachusetts, Including the Merrimack Embayment and Western Massachusetts Bay

Skip past contents information/ Title Page / List of Figures / Conversion Factors / Abbreviations / Abstract / Introduction / Methods / Results / Discussion / Summary / Acknowledgments / References Cited / Appendix — Geospatial Data / Citation Page /

Schematic Images of how sediment texture and distribution data were mapped qualitatively in ArcGIS by using a hierarchical methodology. Backscatter data were the first input, followed by bathymetry, surficial geologic and shallow stratigraphic interpretations, and photograph and sample databases. DEM, digital elevation model. From Pendleton and others (2013).

Figure 10. Sediment texture and distribution data were mapped qualitatively in ArcGIS by using a hierarchical methodology. Backscatter data were the first input, followed by bathymetry, surficial geologic and shallow stratigraphic interpretations, and photograph and sample databases. DEM, digital elevation model. From Pendleton and others (2013).

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