PCB sediment (IMAGE) University of Southern Denmark Caption A sediment core has just been retrieved from the Atacama trench during an expedition with the research vessel R/V Sonne. Credit Anni Glud/SDU. Usage Restrictions w. credit License Original 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.