from The American Heritage® Dictionary of the English Language, 4th Edition

  • A geyser in Yellowstone National Park in northwest Wyoming. Its eruptions, which last about 4 minutes, occur on the average of once every 65 minutes (the intervals can vary from 33 to 90 minutes). The geyser sends up a column of hot water and steam ranging from 35.4 to 53.4 m (116 to 175 ft) high.


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