Textured Obsidian and hardened lava rock on a sunny fall day at the Big Obsidian Flow in the Newberry National Volcanic Monument in Central Oregon.

Textured Obsidian and hardened lava rock on a sunny fall day at the Big Obsidian Flow in the Newberry National Volcanic Monument in Central Oregon.

Photo by hddatmyers

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Stock photo: Textured Obsidian and hardened lava rock on a sunny fall day at the Big Obsidian Flow in the Newberry National Volcanic Monument in Central Oregon. was taken by hddatmyers .