10486.jpg
Steam vents from volcano before giant eruption, Mt St Helens;
Cheryl Haselhorst;
April 4, 1980
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10487.jpg
Cleopatra's Needle, Yellowstone River Canyon, Tower Falls;
R Robinson;
No date
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10488.jpg
Basalt columns in the Canyon - Tower Fall area;
Photographer unknown;
September 1972;
Volcanics
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10489.jpg
Lower Speciment Ridge, Tower Fall Canyon, Bumpus Butte;
R Robinson;
No date
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10490.jpg
Yellowstone Canyon, Tower Fall area;
R Robinson;
No date
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10491.jpg
Grand Canyon of the Yellowstone, Tower Fall area;
R Robinson;
September 1955
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10492.jpg
Basalt in Tower Fall area;
R Robinson;
No date
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11838.jpg
Columnar basalt, Overhanging Cliff;
Jim Peaco;
June 1989
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11839.jpg
Columnar basalt, Overhanging Cliff;
Jim Peaco;
June 1989
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11840.jpg
Columnar basalt;
Jim Peaco;
June 1989
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11841.jpg
Close up of columnar basalt at Overhanging Cliff;
Jim Peaco;
June 1989
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11913.jpg
Bob Smith explaining map of volcanism in the United States;
Photographer unknown;
1988
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11914.jpg
Map of explosive volcanism in the United States;
Photographer unknown;
No date;
Volcanics
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11915.jpg
Diagram of volume of eruptive material;
Photographer unknown;
No date;
Volcanics
|
14414.jpg
Obsidian Cliff;
Photographer unknown;
July 1975
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14425.jpg
Rock sculpture down river from Virginia Cascade;
Roselyn Heil;
September 1989
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14524.jpg
Caldera wall along the Gibbon River;
Jim Peaco;
Octobert 1991;
Volcanics
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14747.jpg
Black & white geologic map of the Yellowstone region showing fault lines, caldera outlines & lava flows;
September 1992
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14748.jpg
Geologic map of Yellowstone Region showing fault lines, caldera outlines & lava flows in black & white;
September 1992
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