Sulfur and Iron Accumulation (IMAGE) University of Gothenburg Caption Sulfur and iron accumulation in three marine-archaeological shipwrecks in the Baltic Sea is shown. Credit University of Gothenburg 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.