The USGS has released a great set of maps of the seafloor along the California coast, including this one of the Golden Gate entrance to the Bay:

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The high resolution images on the USGS site give a very detailed, beautiful view of the amazingly complex features in and around San Francisco Bay. While many people mistakenly imagine the Bay to be flat and featureless, there are gigantic ripples and numerous high points such as Shag Rock that, in the 19th century, were so close to the surface that they endangered shipping, and were subsequently blown up.

Other maps include Tomales Point, Drakes Bay, Pacifica, and Half Moon Bay.

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