Sébastien Castelltort (IMAGE) Université de Genève Caption Sébastien Castelltort facing the Eocene Cis conglomerate cliff, near Roda de Isabena, Spain. Credit UNIGE Usage Restrictions None 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.