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Open-File Report 2010-1007

Sea-Floor Geology and Character Offshore of Rocky Point, New York

By L.J. Poppe,¹ K.Y. McMullen,¹ S.D. Ackerman,¹ D.S. Blackwood,¹ B.J. Irwin,¹ J.D. Schaer,² P.G. Lewit,² and E.F. Doran³

1Coastal and Marine Geology Program, U.S. Geological Survey, Woods Hole, MA 02543
2Office of Coast Survey, NOAA, Norfolk, VA 23510
3Marine Operations Center–Atlantic, NOAA, Norfolk, VA 23510
4Connecticut Department of Environmental Protection, Hartford, CT 06106


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Gridded multibeam bathymetry and sidescan-sonar imagery together cover approximately 21.6 square kilometers of sea floor in eastern Long Island Sound offshore of Rocky Point, New York. Although originally collected for charting purposes during National Oceanic and Atmospheric Administration hydrographic survey H11251, these acoustic data, and the sea-floor sampling and photography stations subsequently occupied to verify them, (1) show the composition and terrain of the seabed, (2) provide information on sediment transport and benthic habitat, and (3) are part of an expanding series of studies that provide a fundamental framework for research and resource management (for example, cables, pipelines, and dredging) activities in this major East Coast estuary.

Posted August 2010

For additional information contact:
U.S. Geological Survey
Woods Hole Coastal and Marine Science Center
384 Woods Hole Road
Quissett Campus
Woods Hole, MA 02543

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Suggested citation:

Poppe, L.J., McMullen, K.Y., Ackerman, S.D., Blackwood, D.S., Irwin, B.J., Schaer, J.D., Lewit, P.G, and Doran, E.F., 2010, Sea-floor geology and character offshore of Rocky Point, New York: U.S. Geological Survey Open-File Report 2010–1007, DVD-ROM. (Also available at







Sidescan Sonar

Sediments Distribution

Bottom Photography

GIS Data Catalog





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