Sand waves 2
The sand waves in the bay have crest-to-crest lengths of up to 722 feet, and some are as high as 33 feet, according to a release put out by the research team. Patrick Barnard, a geologist with the USGS, told the San Francisco Chronicle they are likely in the top 10 percent of the world's sand waves, in terms of size.
That was a surprise because there isn't much in the way of tidal range in the bay, relative to other regions. San Francisco Bay sees a maximum tidal range of 8.7 feet. By comparison, the Bay of Fundy, which is bordered by Nova Scotia, New Brunswick and Maine and has similarly sized sand waves, sees a maximum tidal range of 56 feet.
July 20, 2006 4:46 PM PDT
Photo by: U.S. Geological Survey
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