. Hot Mineral rocks of the Yellowstone Region. Created: Coverage: []. Source Imprint: 1875?-1920?. Digital item published 1-25-2006; updated 6-4-2009. 144 Hot Mineral rocks of the Yellowstone Region, from Robert N. Dennis collection of stereoscopic views

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Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
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