Arctic Expeditions Find Giant Mud Waves, Glacier Tracks (3 of 3) (IMAGE) Ohio State University Caption Sonar image of the Arctic Ocean floor, showing parallel ridges carved by long-ago glaciers. Credit Image Courtesy of Ohio State University. Usage Restrictions news media use only 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.