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New page: thumb|300px|Close view of a fumarole on Kilauea Volcano'''Fumaroles''' are vents from which volcanic gas escapes into the atmosphere. Fumaroles may occur along t...
[[Image:Fumarole.jpg|thumb|300px|Close view of a fumarole on Kilauea Volcano]]'''Fumaroles''' are [[vent]]s from which volcanic gas escapes into the atmosphere. Fumaroles may occur along tiny cracks or long [[fissure]]s, in chaotic clusters or fields, and on the surfaces of lava flows and thick deposits of pyroclastic flows. They may persist for decades or centuries if they are above a persistent heat source or disappear within weeks to months if they occur atop a fresh volcanic deposit that quickly cools.
[[Category:Geology]]
[[Category:Geology]]