Marcasite-Coated Ammonites (IMAGE) University of Zurich Caption These marcasite-coated ammonites were discovered during the re-development of the railway station in Bielefeld, Germany. Credit Picture: Paul Marx / PIXELIO 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.