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Fountain Geyser
Fountain Geyser is a geyser in the Lower Geyser Basin of Yellowstone National Park in the United States.
Fountain is the dominant member of a group of geysers at the Fountain Paint Pots thermal area. Morning Geyser, which erupts from a vent close to Fountain's, is larger, but is inactive during most years. Fountain, by contrast, is usually active. It is a fountain-type geyser that erupts jets ranging in height up to or more, with most eruptions containing at least a few bursts that reach 40 to 50 feet. Intervals between eruptions vary from year to year but are commonly about 6 hours, with occasional longer intervals of 11 to 12 hours. Durations of eruptions are typically about 30 minutes. On occasion Fountain departs from its usual behavior and enters so-called "wild-phase" eruption,〔 during which the height is much reduced but the duration can be as long as two weeks.
Fountain is not to be confused with similarly named, and nearby (and larger), Great Fountain Geyser, another of the major features of Lower Geyser Basin, adjacent to the Firehole Lake road.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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