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U.S. Geological Survey
Geologic Investigations Series Map I-2734
Version 1.0
2004

Prepared in cooperation with the
National Oceanic and Atmospheric Administration

Shaded Relief, Sea Floor Topography, and Backscatter Intensity of Massachusetts Bay and
the Stellwagen Bank Region Offshore of Boston, Massachusetts

By Bradford Butman, Page C. Valentine, William W. Danforth, Laura Hayes, Laurie A. Serrett, and Tammie J. Middleton

Introduction

These maps show the sea floor topography and backscatter intensity of the region offshore of Boston, Mass., at a scale of 1:125,000. Sheet 1 shows seafloor topography in shaded relief view, with sea floor depth superimposed in color. Sheet 2 shows sea floor topography in shaded relief view, with backscatter intensity superimposed in color. Both sheets also show smoothed topographic contours at selected intervals. The maps are based on multibeam echo-sounder data collected on four cruises conducted between the fall of 1994 and the fall of 1998. Additional sea floor bathymetry from the National Geophysical Data Center (NGDC) Coastal Relief Model and onshore topography from the U.S. Geological Survey (USGS) Digital Elevation Model (DEM) are also included. The maps combine multibeam echo-sounder data collected as part of the Stellwagen Bank National Marine Sanctuary map series (Valentine and others, 2001, 2003a–c) and the companion western Massachusetts Bay map series (Butman and others, 2003a–f). For a more detailed description of seabed features, see the maps at a scale of 1:25,000 for quadrangles 1-18 in the Stellwagen Bank National Marine Sanctuary map series, and quadrangles 1 and 2 in the western Massachusetts Bay map series.

Thumbnail image of map I-2734
Thumbnail of Sheet 1, I-2734: Sea floor topograhy in shaded relief view, with sea floor depth in color, and explanatory text

Thumbnail image of Sheet
     2, map I-2734
Thumbnail of Sheet 2, I-2734: Backscatter intensity draped over sea floor topography in shaded relief view


Geologic Investigations Series Map I-2734

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Contact Information

For questions about the scientific content of this report, contact Bradford Butman.


U.S. Department of the Interior, U.S. Geological Survey
URL: https://pubs.usgs.gov/imap/i2734/index.html
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Last modified: 17:38:37 Wed 30 Nov 2016
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