Obsidian lava flow and Mt. Shasta, CaliforniaApril 30, 2017/in /by Marli Miller rhyolite flow, volcanic, Cascade volcanoes 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 19:50:542021-10-19 05:13:02Obsidian lava flow and Mt. Shasta, California
