Loop-Shaped Iceberg Plough Mark (image) British Antarctic Survey Share Print E-Mail Caption An almost circular iceberg ploughmark from south of Brasvelbreen, Svalbard. Red 25 m water depth, green 50 m. Credit Atlas of Submarine Glacial Landforms (2017) Usage Restrictions With appropriate caption and credit only. 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.