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Open-File Report 2016–1119


Shallow Geology, Sea-Floor Texture, and Physiographic Zones of Vineyard and Western Nantucket Sounds, Massachusetts 


Skip past contents information/ Title Page / List of Figures / Conversion Factors / Abbreviations / Abstract / Introduction / Methods / Results / Discussion / Summary / Acknowledgments / References Cited / Appendix 1 — Geospatial Data / Citation Page /


A composite backscatter image at 1-meter resolution, created from a series of published backscatter images.


Figure 4. A composite backscatter image at 1-meter resolution, created from a series of published backscatter images (table 1). Areas of high backscatter (light gray tones) have strong acoustic reflections and suggest boulders, gravels, and generally coarse sea-floor sediments. Low-backscatter (dark gray to black tones) areas have weak acoustic reflections and generally indicate finer grained material such as fine sands and muds. Red star shows location of figure 20.

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