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Old Faithful Geyser

 
 

United States Atlas > Travel Photos | Old Faithful

 
Old Faithful Geyser is located in the Upper Geyser Basin of Yellowstone National Park in Wyoming.  The Washburn Expedition of 1870, the first official expedition to Yellowstone, named it for its regular eruptions; it averages nearly one per hour, with intervals ranging from 35-120 minutes.  Old Faithful's eruptions result from an underground buildup of high-pressure, boiling water.  The steaming liquid eventually forces its way to the surface and out through a mineral cone.  The geyser then sputters and bubbles for about ten minutes before spraying 3,700 to 8,400 gallons of water high into the air.  While eruptions at Old Faithful are usually about 130 feet high, they can reach heights of more than 180 feet.

Old Faithful geyser in Yellowstone Park, Wyoming
Old Faithful

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Old Faithful Geyser - Yellowstone National Park