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April 2004
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Porcelain Basin

Whirligig Geyser spouts in the Procelain Basin of the Norris Geyser Basin in Yellowstone National Park.

On Tuesday, April 27, Craig Johnson (Web technician) took advantage of a sunny and warm spring morning to shoot video of the Porcelain Basin area within Norris Geyser Basin. One of the more striking features was Whirligig Geyser, which, when it erupts, emits a rythmic sound similar to the woosh-woosh of helicopter blades. The geyser's runoff channel is colored by heat-loving (thermophilic) bacteria and algae.

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Last Updated: Monday, 27-Feb-2006 14:09:39 Eastern Standard Time
http://www.nps.gov /archive/yell/tours/thismonth/april2004/video/porcelain.htm