A photo of the tephra ring of Panum Crater, taken from within the crater, with the Sierra Nevada mountains in the background. The rock observed here is mostly rhylolite. Photo 3 shows an excellent example of flow bands of obsidian and pumice in the rhyolite. Crater Mountain, the tallest of the chain, rises 2000 feet to the 9172-foot level from the floor of Pumice Valley below. That's me, taking a break from field work for a photo.
Mono Lake is visible in the background.
Kerry's back is in the foreground. Mono Lake and Paoha Island are visible in the distance. My picture, from that sample site. Again, Mono Lake and Paoha Island are visible in the distance. A zoom-in of Mono Lake.