Fluidr / James St. John's "Witches Cauldron (Grand Group, Upper Geyser Basin, Yellowstone Hotspot Volcano, nw Wyoming, USA)" set

User / James St. John / Sets / Witches Cauldron (Grand Group, Upper Geyser Basin, Yellowstone Hotspot Volcano, nw Wyoming, USA)
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Witches Cauldron (1965)

N 3 B 588 C 0 E Jun 21, 2024 F Jun 26, 2024

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(public domain photo provided by the American National Park Service; original taken by George Marler)
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Witches Cauldron is a geyser along the northeastern banks of the Firehole River in the western Grand Group of Yellowstone's Upper Geyser Basin. It is an irregularly-shaped, blue water-filled pool about 11 x 8 meters in size. Its activity consists of constant roiling and bubbling with some moderately-low surging.

In 1999, researchers measured the water's temperature at 95 degrees Celsius, with a pH of about 8.2 (= slightly alkaline).

Tags: Witches Cauldron hot spring springs geyser geysers Grand Group Upper Basin Yellowstone Wyoming 1965