Ryan O'Grady, LacCore (IMAGE) University of California - Berkeley Caption Ryan O'Grady of LacCore examines a 3-meter coring tool after it's brought up from 137 meters below the bottom of Clear Lake. The tool contains a plastic pipe that encases the lake sediments. Credit Robert Sanders, UC Berkeley media relations 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.