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West Thumb
Geyser Basin

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Percolating Spring

When it was named, Percolating Spring bubbled vigorously like a coffee pot.


West Thumb Geyser Basin Tour

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Last Updated:
Wednesday, 22-Dec-2004 10:11:48 Eastern Standard Time
http://www.nps.gov /archive/yell/tours/westthumb/percolating.htm