We traveled to eastern Oregon to explore the impact of volcanism on the landscape. Oregon has the deepest concentrations of lava in the world with depositions over a mile deep in the northeast corner of the state. Hole-in-the-Ground was formed 15,000 years ago when magma came into contact with ground water. Steam driven volcanic explosions created this tuff ring (maar), which is almost a mile in diameter and 500 feet deep. (The image is a panorama; click to open it at full width and scroll.)
Hole-in-the-Ground
We traveled to eastern Oregon to explore the impact of volcanism on the landscape. Oregon has the deepest concentrations of lava in the world with depositions over a mile deep in the northeast corner of the state. Hole-in-the-Ground was formed 15,000 years ago when magma came into contact with ground water. Steam driven volcanic explosions created this tuff ring (maar), which is almost a mile in diameter and 500 feet deep. (The image is a panorama; click to open it at full width and scroll.)