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Yellowstone National Park

Yellowstone National Park: Steam Vents

Steam Vents

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Fumaroles, or steam vents, are hot springs with a lot of heat, but so little water that it all boils away before reaching the surface. At places like Roaring Mountain, the result is a loud hissing vent of steam and gases.

Content Provided by the National Park Service

Mammoth, WY Weather

38°
( 3° C)