Lockwood over at the Interzone has recently noticed that there’s a columnar basalt theme going on in the geoblogosphere. So, to keep the ball rolling I thought I’d throw in one from central Oregon. This one is from outside the town of Kimberly, OR. I took it while on a field studies trip to the John Day Formation. If I’m remembering correctly this outcrop is part of the Picture Gorge basalt flow which is about 15 million years old.
Crude columnar basalt formation- Picture Gorge Flow
Glacial Till 