Deep-Frozen Sediment Core (IMAGE) University of Rhode Island Caption A deep-frozen sediment core which was frozen on board immediately after sampling for microbiological analysis. DNA was extracted from the frozen core in a clean room. Credit Photo courtesy of JAMSTEC. 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.