Close Survey (IMAGE) Columbia Climate School Caption On Crooked Island, study coauthor William D’Andrea operates a GPS instrument that records the exact location and elevation of rocks. 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.