This pic has absolutely nothing to do with Field Camp. This is Glass Mountain near Mono Lake in California. We came here on the Death Valley/Bishop seminar trip. The mountain is made up of all obsidian and pumice. I remember some guy in Yellowstone was trying to tell us that all the obsidian in the country used as arrow heads came from Yellowstone. He had no idea what he was talking about hence the giant obsidian mountain here.