Twelve Mile Circle – An Appreciation of Unusual Places

Tag: Newberry Caldera

  • The Big Obsidian Flow

    Deschutes County, Oregon, USA (July 2012) The Big Obsidian Flow has an appropriate albeit unimaginative name for this geological structure in central Oregon, just east of the Cascades. It is indeed a big obsidian flow. It forms part of the vast Newberry National Volcanic Monument, founded in 1990 within the Deschutes National Forest, and specifically…