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U.S. Geological Survey Open-File Report 2011–1004

Sea-Floor Geology and Character of Eastern Rhode Island Sound West of Gay Head, Massachusetts

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Title | List of Figures | Conversion Factors | Abstract | Introduction | Setting | Methods | Bathymetry | Sediment Distribution | Bottom Photography | GIS Data Catalog | Summary | Acknowledgments | References | Contacts

Figure 18. A chart showing grain-size classifications.

Figure 18. Correlation chart showing the relationships between phi sizes, millimeter diameters, size classifications (Wentworth, 1922), and ASTM and Tyler sieve sizes. Chart also shows the corresponding intermediate diameters, grains per milligram, settling velocities, and threshold velocities for traction.

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