Gulkana Glacier 50 Years Ago and Today (IMAGE) University of Alaska Fairbanks Caption Between 1967 (top photo) and 2016 (bottom photo), the Gulkana Glacier has lost a volume of ice equivalent to a layer of water more than 80 feet deep across its current area. Credit Photos courtesy of the U.S. Geological Survey. Usage Restrictions Please credit photographer 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.