Charred Tree Trunk (IMAGE) Johannes Gutenberg Universitaet Mainz Caption A charred tree trunk in the deposits of the Laacher See volcanic eruption: the individual annual rings of the sample were decisive for the exact dating of the eruption. Credit photo/©: Olaf Jöris Usage Restrictions This image may only be used in connection with the press release "Eruption of the Laacher See volcano redated", issued by Johannes Gutenberg University Mainz on July 1, 2021. 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.