Exposed rock ridges are thick Pleistocene lava flows that were conf...
By Volcano Hazards Program
1905 (approx.)
![Exposed rock ridges are thick Pleistocene lava flows that were conf...](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/vhp_img1203.jpg?itok=ZLr4rbL-)
Detailed Description
Exposed rock ridges are thick Pleistocene lava flows that were confined between large glaciers. Glacier Peak, Washington, view north.
Sources/Usage
Public Domain.