U.S. Geological Survey Multibeam Data and Socio-Economic Issues in West-Central San Francisco Bay
Rocks on the Floor of San Francisco Bay - Hazards to Navigation?Three rock pinnacles--Harding, Shag, and Arch on the floor of west-central San Francisco Bay--lie adjacent to the navigation lanes and rise to potentially hazardous elevations for shipping traffic. The shallowest parts are outlined in yellow. Nearby depressions are outlined in orange.
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