This cliff of black and white volcanic rocks is easily viewed from the Summer Lake, OR, rest stop, and from points north on Oregon Route 31, the Outback Scenic Byway. If anyone has any info about the geology of this cliff, please comment! What I see is a dark-colored mass of mafic or intermediate ash-fall material overlain by some layers of white, probably felsic, air-fall tuff, the deposition of which was interrupted by a basalt flow toward the left, so that some of the older whitish tuff layers are below the basalt flow, and some are above the basalt flow. Just a guess, however.
Google Maps: Summer Lake is the junction in the southeast, cliff is the white area in the northwest.
Detail of part of the cliff, showing some hoodoos.
This is the part of Oregon covered by Andrew Alden's recent post and photo gallery about the Oregon Outback. I've personally driven by here many times, usually in late July; this picture is from Day 8 of our recent Oregon trip (Day 7: volcano observatory, rock garden, Smith Rock).
I've never made it to the annual Paisley Mosquito Festival. Have always wondered ... have never stopped ... and have always keep my windows closed!
Trip report to be continued...