Cape Rasmussen (IMAGE) Geological Society of America Caption Cape Rasmussen, one of the study sites mentioned in the paper. Credit: Derek J. Ford. Credit Derek J. Ford Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.