Volcanics, Igneous

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Basalt flow, overhanging cliff; RG Johnsson; 1964


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Basalt columns at Overhanging Cliff; RG Johnsson; 1964


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Basalt columns at Overhanging Cliff; Rosalie LaRue; 1976


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Columnar basalt flows across canyon from Overhanging Cliff; Photographer unknown; 1963


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Basalt flows in canyon north of Toer Falls; Susan Tweit; 1976


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Basalt flows near Tower Falls; Rosalie LaRue; 1976


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Basalt columns in flow near Tower Falls; JR Douglass; 1969; Volcanics


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Basalt columns in flow near Tower Falls; JR Douglass; August 1969


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Close up showing texture of Yellowstone Tuff near Virginia Cascades; John Good; 1965


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Cliff face of angularly fractured Yellowstone Tuff; John Good; 1967


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Tuff Cliff; Stan Canter; 1966


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Weathering of Yellowstone tuff at Virginia Cascade; John Good; 1965


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Weathering of Yellowstone tuff at Virginia Cascade; John Good; 1965


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Welded Yellowstone tuff showing gas pockets at Virginia Cascades; John Good; September 1965


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Thickness of Yellowstone Tuff in Gibbon Canyon; John Good; September 1965


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Welded Yellowstone Tuff along the Gibbon River; John Good; September 1965


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Tuff, basalt contact on east side of Gardner Canyon; Photographer unknown; 1964


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Close up of flow breccia on Tuff Cliff; John Good; September 1965


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Pumice breccia on Purple Mountain; John Good; September 1965


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Breccia in the hoodoos, pocket knife shown for size scale; Photographer unknown; 1964


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