<p>Close up of a rock with banding of obsidian through it</p>
<p>Obsidian cliff obsidian</p>
<ul><li>Keywords: jacob w. frank; obsidian cliff; ynp; yellowstone; yellowstone national park; fall; winter; 20171115-jwf-2247</li></ul>
Jacob W. Frank
Taken on 15 November 2017
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