Geo 365: March 7, Day 66: Hammer for Scale

Dana holds a hammer for scale over a set of normal faults forming a tight horst at Table Rock. Directly over the hammer, near the top of the photo, is a clast (actually two, the obvious one and another, smaller, to its right) that is much larger than anything around it. I suspect that was lobbed by an explosive blast at the actual vent, which would have been something like a mile and a half away.

Talk about nasty weather.

Photo unmodified. August 20, 2011. FlashEarth Location.