Research on Raw Materials (IMAGE) Jacobs University Bremen gGmbH Caption Researcher David Ernst with a deep-sea ferromanganese crust, a potential unconventional resource of critical high-technology metals. Credit Jacobs University Bremen Usage Restrictions Jacobs University Bremen License Original 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.