Ferromanganese Crusts (image) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Share Print E-Mail Caption These are ferromanganese crusts with typical band structure. Credit Source: Buczkowski, USGS. Usage Restrictions only in the context of this presse release. Share Print E-Mail 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.