File:Black Pool 7.jpg
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Summary
[edit]DescriptionBlack Pool 7.jpg |
English: Black Pool, northern Lower Group, West Thumb Geyser Basin, Yellowstone Hotspot, northwestern Wyoming, USA in July 2012.
Black Pool is a very hot, moderately deep, irregularly-outlined, and intensely blue- to deep turquoise-colored. It was formerly a deep greenish-black color, from the presence of yellowish extremophile bacterial mats on the pool walls and floor. Subsequent natural heating of this feature has knocked out most of the bacterial mats. Abundant, suspended, <0.5µ-sized, colloidal silica particles are responsible for the blue coloration of the water. In 1991 and 1992, Black Pool had atypical activity, coinciding with activity at nearby Abyss Pool (see above). One explosive eruption here in August 1991 involved the forceful detachment and nearby deposition of geyserite clasts. Boiling water domes up to 3 feet high were present in the pool after that eruption, accompanied by significant overflow. Small eruptions also occurred at Black Pool in 1992. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/8269782917/ |
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@N05/8269782917. It was reviewed on 24 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
24 February 2023
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current | 17:34, 24 February 2023 | 960 × 644 (246 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/8269782917/ with UploadWizard |
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