• Overhanging Cliff near Tower Fall, Yellowstone Park.

    J. E. Haynes Photo Co

    Colorized postcard of Overhanging Cliff near Tower Fall in Yellowstone National Park. Overhanging Cliff is a cliff of vertical basalt that overhangs the Grand Loop Road just north of Tower Fall on the…

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  • Obsidian Cliff, Yellowstone Park.

    Acmegraph Co

    Colorized postcard of Obsidian Cliff in Yellowstone National Park. Obsidian Cliff is about 180,000 years old and was formed from a rhyolite lava flow, it stretches upward 200 feet above Obsidian Creek…

    View Full Item  in Billings Public Library