File:Fountain Geyser eruption (3 54-4 20 PM, 7 July 2016) 14 (28132254050).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 83.4° Celsius (= 182° Fahrenheit), with a pH of about 8.5.
Date
Source Fountain Geyser eruption (3:54-4:20 PM, 7 July 2016) 14
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/28132254050 (archive). It was reviewed on 14 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

14 October 2019

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current04:01, 14 October 2019Thumbnail for version as of 04:01, 14 October 20193,789 × 2,935 (5.48 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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