Quelccaya Margin 1977 (image) Ohio State University Caption This photo from a 1977 expedition to Quelccaya Ice Cap in Peru shows clearly defined annual layers of ice and dust visible in the ice cap's margin. Researchers at the Ohio State University are using a set of ice cores taken from Quelccaya as a "Rosetta Stone" for studying other ice cores taken from around the world. Credit Photo by Lonnie Thompson, Courtesy of Ohio State University. Usage Restrictions None 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.