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Western Coastal and Marine Geology
U.S. Geological Survey
Scientific Investigations Map 2944

Sand Waves at the Mouth of San Francisco Bay, California

By Patrick L. Barnard, Daniel M. Hanes, Rikk G. Kvitek, and Pat J. Iampietro

2006

Background

A multibeam bathymetric survey that produced unprecedented high resolution images of the mouth of San Francisco Bay was conducted in 2004 and 2005. The survey, performed over forty-four days by the Seafloor Mapping Lab at California State University, Monterey Bay, consisted of 1,138 track lines, 1.1 billion soundings, and covered an area of 154 km2 (60 mi2). The goals of this survey were to analyze sediment transport pathways at the mouth of San Francisco Bay and to calculate bathymetric change since the last survey was completed in 1956. The survey showed that significant bathymetric changes have occurred over the past 50 years. It also revealed that the study area contains sand waves that are among the largest and bedform morphologies that are among the most varied in the world.

This set of five sheets shows views of the sand waves on the seafloor from different perspectives along with descriptive text.

Download Sheet 1 of 5 as a 49" x 37" PDF file (12 MB). Main text and illustrations

Download Sheet 2 of 5 as a 48" x 36" PDF file (3.1 MB). Large perspective view of the giant sand wave field at the mouth of San Francisco Bay, just seaward of the Golden Gate Bridge.

Download Sheet 3 of 5 as a 36" x 36" PDF file (5 MB). Shaded relief image of the floor of the mouth of San Francisco Bay.

Download Sheet 4 of 5 as a 24" x 36" PDF file (8.1 MB). Four more perspective views of sand waves at the mouth of San Francisco Bay, just seaward of the Golden Gate Bridge.

Download Sheet 5 of 5 as a 24" x 36" PDF file (11 MB). Diverse sand waves at the mouth of San Francisco Bay, just seaward of the Golden Gate Bridge.

Preview of the large sheets as small page-sized images (SIM-2944_preview.pdf; 1.3 MB)

The data that supports this map series has been posted at http://seafloor.csumb.edu/SFMLwebDATA_c.htm#SFB at the Seafloor Mapping Lab at California State University, Monterey Bay.

For questions about the content of this report, contact Patrick Barnard

Version history


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There are five sheets that make up this poster series, three of which are being printed (Sheets 1, 2, and 4). When funding is available, we will print Sheet 3 as well. Sheet 5 is available only on the Web.


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