Scientist examines firn core
![USGS scientist, examines a full firn core taken on Wolverine Glacier in Alaska.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/Sass%20Pondering%20Firn%20Core.jpeg?itok=ionTyWoN)
Detailed Description
USGS scientist Louis Sass examines a full firn core taken on Wolverine Glacier, making observations of any notable dust or dirt layers in the snow and firn stratigraphy.
Sources/Usage
Public Domain.
Photo taken by Emily Baker, U.S. Geological Survey