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Thermal features
Holes in the Earth's crust from which hot water and steam (geysers), and gases and vapors (fumaroles) are emitted. [Adapted from USGS Circ 1048 and Glossary of Geology, 4th ed.]
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Geysers, fumaroles, and hot springs [New Window]
Description of volcanic geysers, fumaroles, and hot springs.
Scientists discover analog for extraterrestrial life in Idaho Hot Springs [New Window]
Report on a community of microscopic organisms, Archaea, found deep in an Idaho hot spring living on hydrogen and carbon dioxide that could possibly exist on other planets. Includes links to related studies, investigators, and microbiology.
Hydrologic studies in Long Valley caldera [New Window]
Hydrologic monitoring data for Long Valley caldera, California, on springs, streams, wells, fumaroles, and precipitation to study the natural hydrologic variations and the response of the hydrologic system to volcanic and tectonic processes.
Taming of a wild research well in Yellowstone National Park during November 1992 [New Window]
A valve failed in a research well, causing an uncontrolled eruption of steam and hot water. Video program shows technical problems encountered in controlling and capping the well.


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