Extremely high-resolution maps of the seafloors offshore of Tomales Point, Drakes Bay and San Francisco Bay were published late last month by the United States Geological Survey, as part of a multi-million dollar, decade-long partnership with other agencies to pin down baseline conditions of the seafloor. The effort, called the California Seafloor and Coastal Mapping Program, is meant to help state and federal governments and academic institutions study sea-level rise, coastal erosion, earthquake risk and…