Surface of the Blue Ice Field (IMAGE) University of Bonn Caption Surface of the blue ice field in Horseshoe Valley exposed by wind erosion. The erected layers show younger ice on the right and older ice on the left. Credit © Chris Turney Usage Restrictions This image may be used together with the press release. 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.