Boulder Ice Cave Glacier 1932 and 1988
By Northern Rocky Mountain Science Center
1988 (approx.)
Detailed Description
Boulder Glacier Ice Cave: 1932, TJ Hileman, GNP Archives – 1988, J DeSanto, U of M Library
This photo pair inspired the USGS to document glacier and landscape change using oblique photography.
View the full collection at USGS Photographic Library
Sources/Usage
Public Domain.