Ancient Remains (IMAGE) Columbia Climate School Caption For researchers William D’Andrea and Jacqueline Austermann, a small cave on Crooked Island offers shelter from rain, and a close look at fossilized ripples formed on an ancient sand dune. Credit Blake Dyer Usage Restrictions Credit must be given. 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.