A final shot of the ignimbrite on the approach to Tombstone Pass, at the crest of the Western Cascades along Route 20. Plants evidently can, under the right circumstances, get established in this material, but a single hot, dry year can kill them off. Below, as I sometimes do, I've included a landmark to help find this spot. There are a number of pullouts, and at least two (and I think more) with similar exposures. This sign is just uphill from the pullout at the exposure I've been curious about since I first saw it, 30-some odd years ago.