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Fumarole on Kīlauea Volcano, Hawaiʻi

Detailed Description

Fumarole on Kīlauea Volcano, Hawaiʻi. Elemental sulfur vapor escaping from the fumarole has cooled to form yellow-colored crystals around its margins. Credit: Robert L. Christiansen.

http://volcanoes.usgs.gov/vsc/glossary/fumarole.html

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