Elwha Researchers (IMAGE) University of Washington Caption Andrea Ogston (upper right) and students empty sediment into a bucket to study the contents. Credit Emily Eidam, Univ. of Washington Usage Restrictions With credit 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.