Rhyolitic obsidian flow, Oregon.April 30, 2017/in Volcanic activity/by Marli Miller volcanic, rhyolite, RGO, dwshed https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png Marli Miller2017-04-30 20:19:372019-10-16 06:46:38Rhyolitic obsidian flow, Oregon.
