File:Fountain Geyser (1965) (30894684057).jpg

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Fountain Geyser is a large, regularly-erupting feature in the Fountain Group of Yellowstone’s Lower Geyser Basin. It has a moderately large, irregularly polygonal surface vent that is 6 to 12 meters across. The vent is surrounded by a geyserite platform with moderately developed concentric ridges at its eastern edge. Eruption starts are preceded by a relatively rapid rise in water level. Eruptions occur every ~4.5 to 6 hours and last for about 30 minutes. Some eruptive bursts reach up to ~80 feet high. Much of the erupted water volume moves northward into Morning Geyser’s basin, which overflows and then heads north into a large field of weathered geyserite gravel. Bursting patterns show that Fountain Geyser erupts from two major subaqueous vents.

In 1998, researchers measured Fountain Geyser’s water temperature at 83.4º Celsius (= 182º Fahrenheit), with a pH of about 8.5.
Geysers are hot springs that episodically erupt columns of water. They occur in few places on Earth. The highest concentration of geysers anywhere is at the Yellowstone Hotspot Volcano (northwestern Wyoming, USA).
(Original photo by George Marler; public domain image provided by the American National Park Service.)
Date Taken in 1965
Source Fountain Geyser (1965)
Author George Marler, U.S. National Park Service

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Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

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current04:04, 14 October 2019Thumbnail for version as of 04:04, 14 October 20191,977 × 1,314 (1.17 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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