Volcanics, Igneous

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Breccia showing thin soil layer; John Good; June 1965


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Absaroka volcanics cliff at the Northeast entrance; William W Dunmire; 1969


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Absaroka volcanics cliff at the northeast entrance; William W Dunmire; 1969


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View of Central Plateau (caldera) from Mt Washburn; John Good; 1965


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View of Tower Creek basin, a possible caldera; John Good; 1966


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Basalt columns in the Tower Falls area; J Schmidt; 1977


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Obsidian; J Schmidt; 1977


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Obsidian in rhyolite; J Schmidt; 1977


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Obsidian Cliff; J Schmidt; 1977


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Obsidian Cliff; J Schmidt; 1977


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Sheepeater Cliff; J Schmidt; 1977


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Overhanging Cliff; RG Johnsson; 1963


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Fountain eruption, Hawaii Volcanoes National Park; RG Johnsson; 1959; Volcanics


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Lava Lake, Hawaii Volcanoes National Park; William W Dunmire; 1960; Volcanics


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Obsidian in the ground; William S Keller; 1976


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Obsidian Cliff; William S Keller; 1976


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Petrified tree; William S Keller; 1979


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Basalt columns; William S Keller; 1977


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Obsidian Cliff; William S Keller; 1964


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Obsidian Cliff; William S Keller; 1976


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