Drill core taken off the Antarctic coast (IMAGE) Utrecht University Caption Drill core taken from the ocean floor off the Antarctic coast during a previous expedition in which dr Peter Bijl (Utrecht University) participated (IOPD Expedition 318, 2010). The rocks in the drill core are the debris stones brought in by icebergs, in the greenish ocean floor mud. Credit Peter Bijl, Utrecht University Usage Restrictions Use is permitted provided the source is acknowledged 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.