(IMAGE) Université de Genève Caption Accumulation of sedimentary rocks in the Spanish Pyrenees. The red and yellow strata show sediment deposited on the continent 56 million years ago. Credit © Marine Prieur Usage Restrictions none 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.