File:A468, Newberry National Volcanic Monument, Oregon, USA, Big Obsidian Flow, detail of cracked obsidian, 2016.jpg

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English: Newberry National Volcanic Monument, Oregon, USA, Big Obsidian Flow, detail of cracked obsidian
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Author Brian W. Schaller
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current21:34, 13 February 2017Thumbnail for version as of 21:34, 13 February 20171,024 × 683 (393 KB)Brian W. Schaller (talk | contribs)User created page with UploadWizard

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