sediment cores (IMAGE) Johannes Gutenberg Universitaet Mainz Caption The researchers use sediment cores to record settlement remains and to reconstruct landscape evolution at selected sites on the tidal flats. Credit photo/©: Justus Lemm Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.