Castleguard Glacier (image) Iowa State University Share Print E-Mail Caption Researchers measure the topography of an exposed glacier bed at Castleguard Glacier in the Rocky Mountains of Alberta, Canada. Credit Photo by Keith Williams, contributed by Christian Helanow. Usage Restrictions None 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.