Fossil Hunting (IMAGE) University at Buffalo Caption UB researchers Sam Kelley, left, and Sandra Cronauer pick fossils out of a Greenland moraine -- a rock, sediment and shell pile created when a growing glacier bulldozed material in its path into a pile. Such fossils hold clues about the history of the Greenland Ice Sheet, a new study finds. Credit Jason Briner Usage Restrictions This image may only be used in conjunction with news stories covering the research in the associated press release. 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.