14749.jpg
Map of Yellowstone National Park showing caldera outline;
September 1992
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16000.jpg
Tuff Cliff;
Jim Peaco;
October 1998;
Volcanics
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16068.jpg
Columnar basalt at Overhanging Cliff;
Jim Peaco;
September 1997
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16123.jpg
Sheepeater Cliff;
Jim Peaco;
September 1999;
Volcanics
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16124.jpg
Obsidian Cliff;
Jim Peaco;
September 1999
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16125.jpg
Obsidian Cliff;
Jim Peaco;
September 1999;
Volcanics
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16271.jpg
Rhyolitic lava flow at Black Sand Geyser Basin;
Jim Peaco;
November 1999
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16532.jpg
Dr Robert Smith at Lake Butte seismograph;
Jim Peaco;
August 2000
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16772.jpg
Dr Robert Smith at Lake Butte seismograph;
Jim Peaco;
August 2000
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16773.jpg
Dr Robert Smith & a graduate student at Lake Butte seismograph;
Jim Peaco;
August 2000
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16774.jpg
Dr Robert Smith & graduate student at bench mark near LeHardy Rapids;
Jim Peaco;
August 2000
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16775.jpg
Benchmark near LeHardy Rapids - this benchmark is the reference point used to measure the area where the ground surface has increased & decreased in elevation, caused by the resurgent lava dome;
Jim Peaco;
August 2000
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16776.jpg
Lava Creek lava flow;
Jim Peaco;
August 2000
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17191.jpg
Lava Creek Tuff;
Jo Suderman;
June 2001
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17237.jpg
Rhyolitic lava flow along the Firehole River looking west on the Madison River drainage;
Jim Peaco;
July 2001
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17238.jpg
Rhyolitic lava flow along the Firehole River;
Jim Peaco;
July 2001
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17240.jpg
Eocene Absaroka volcanics conglomerates in the Tower area;
Jo Suderman;
June 2001
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17253.jpg
Aerial view of Lava Creek lava flow at Firehole Canyon;
Jim Peaco;
July 2001
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17254.jpg
Aerial view of Huckleberry Ridge Tuff on Mt Everts;
Jim Peaco;
July 2001
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17255.jpg
Aerial of Pleistocene basalt lava flow at Undine Falls (700,000 years old);
Jim Peaco;
July 2001
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