Balfour Glacier_UMaine (IMAGE) University of Maine Caption View looking westward down the debris-covered Balfour Glacier toward the Tasman Sea. The sharp transition from white snow to brown debris-rich ice marks the position of the snowline on the glacier, which is determined by the temperature of the atmosphere. Credit Photo by Aaron Putnam Usage Restrictions None License Original 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.