U.S. Department of the Interior Scientific Investigations Map 2944 U.S. Geological Survey Sand Waves at the Mouth of Sheet 4 of 5 San Francisco Bay, California ATMOSPH 1 1 ND ER A IC IC A N D Patrick L. Barnard , Daniel M. Hanes , A M E IN C I S Center for Integrative O National Oceanic California State University, T United States Army L R A A 2 2 N T O I I O Coastal Observation, T and Atmospheric Monterey Bay, , N Corps of Engineers, Rikk G. Kvitek and Pat J. Iampietro A N U . E S Research and Education C . Administration D Seafloor Mapping Lab San Francisco District R E E P M A M R O T C M F E N O T depth (m) 2 San San 9 A Francisco Francisco 17 Marin Pt.Pt. LobosLobos 24 A Bay 32 County 39 47 D 55 62 70 77 San 85 Francisco 92 100 B 107 115 C Pacific N Ocean Marin Headlands N 3 kilometers B Oakland San Francisco Angel Island Bay Alcatraz Island San Francisco Marin Headlands BakerBaker BeachBeach Pt. Bonita Mile Rock Pt.Pt. LobosLobos Ocean Beach N C Marin Headlands D Pt. Bonita San Pt. Lobos Pt. Bonita Francisco Bay Marin Fort Point Headlands Pacific Ocean Baker Beach Mile Rock San Francisco Baker Beach San Francisco N Pt.Pt. LobosLobos N Perspective views of sand waves at the mouth of San Francisco Bay, just seaward of the Golden Gate Bridge. The shaded relief bathymetry was created with a 2-m grid, a 4x vertical exaggeration, sun azimuth of 240 degrees, and a sun angle of For more information on this study, go to http://walrus.wr.usgs.gov/coastal_processes/ 66 degrees. The land topography was generated by overlaying digital orthophoto quadrangles (DOQs) on USGS digital DO NOT USE FOR NAVIGATIONAL PURPOSES elevation models (DEMs), with 2x vertical exaggeration. The Golden Gate Bridge is approximately 2 km long (1.2 mi). Bathymetry data inside the bay is from Dartnell and Gardner (1999). Golden Gate Bridge model courtesy of Interactive Any use of trade, firm, or product names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Visualization Systems.© For sale by U.S. Geological Survey, Information Services, Box 25286, Federal Center, Denver, CO 80225, 1-888-ASK-USGS 1 U.S. Geological Survey Digital files available at http://pubs.usgs.gov/sim/2006/2944/ 2 California State University, Monterey Bay Manuscript approved for publication September 20, 2006.