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West Thumb
Geyser Basin

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Abyss Pool

Visitors gaze into the deep blue water of Abyss Pool next to Yellowstone Lake.

One of the deeper hot springs in the park, Abyss Pool descends to 53 feet (16 meters). It varies from turquoise blue to emerald green to various shades of brown. In 1883, a park visitor described it as "a great, pure, sparkling sapphire rippling with heat."

West Thumb Geyser Basin Tour

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Last Updated: Friday, 13-May-2005 19:01:38 Eastern Daylight Time
http://www.nps.gov /archive/yell/tours/westthumb/abysspool.htm