A Close up of One of the Blocks (IMAGE) University of Leeds Caption This is a close up of one of the blocks from ammonite pavement bed. Credit © The Trustees of the Natural History Museum, London [2017]. All rights reserved. Usage Restrictions Must include full credit 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.