Glass Mountain obsidian flow at Medicine Lake volcano, CA.
![Glass Mountain obsidian flow at Medicine Lake volcano, California....](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/vhp_img5751.png?itok=I9HSnyCZ)
Detailed Description
Glass Mountain obsidian flow at Medicine Lake volcano, California. Glass Mountain is a spectacular, nearly treeless, steep-sided rhyolite and dacite obsidian flow that erupted just outside the eastern caldera rim and flowed down the steep eastern flank of Medicine Lake volcano.
Sources/Usage
Public Domain.