Silurian Rocks (IMAGE) Proceedings of the National Academy of Sciences Caption These are lower Silurian rocks of the Turesø Formation, Centrum Sø, Kronprins Christian Land, North Greenland. Credit Jan Audun Rasmussen (Morslands Historiske Museum, Nykøbing Mors, Denmark) 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.