- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
During construction of a road in 1931, a cut made in proposed fill exposed ice for a horizontal distance of 600 feet and under less than two feet of overburden. The color of the ice was blue-gray and, despite the abundance of talus on the slope where it was found, it was remarkably free of debris. Fill was placed on the ice and the road constructed over it. Although the ice cannot be seen, as it melts the road sinks slowly. Because of the clean nature of the ice in a debris-strewn environment, it is thought to be a relict of the Wisconsin Age rather than having been formed under present conditions.