Yuba Fan (IMAGE) University of California - Santa Barbara Caption Red circles indicate mercury sediment sampling locations and the yellow line is the longitudinal transect along which mining sediment travels from the Sierra to San Francisco Bay-Delta. Credit UCSB Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.