Newberry Flow at South Sister, Oregon

The largest of the Devil's Hills is the Newberry Flow, the highest up on the flanks of South Sister. In this view, you can clearly see the pressure ridges of the flow and the very steep margin of the flow -- you might call this a coulee. When we were in the valley next to the end of the Newberry flow, you could really get the perspective of the size of it, with walls of 30+ foot / 10 meter rubbly lava that meets the glacial lake below South Sister. I do have a standing bet with a friend that the next eruption from South Sister will be another rhyolite eruption, but the uplift that got us all excited about 12 years ago as slowed to a barely noticeable pace.

Image: USGS