Chaney Glacier Perimeter: 1966, 1998, 2005, 2015. (IMAGE) U.S. Geological Survey Caption The perimeter of Chaney Glacier in Glacier National Park in 1966, 1998, 2005, and 2015. Credit U.S. Geological Survey Usage Restrictions None 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.