A special type of hot spring characterized by intermittent discharged of water and volcanic gases brought about by expansion of a vapor phase (generally steam) in the subsurface.
Most geysers are hot springs that episodically erupt fountains of scalding water and steam. Such eruptions occur as a consequence of groundwater being heated to its boiling temperature in a confined space (for example, a fracture or conduit). A slight decrease in pressure or an increase in temperature will cause some of the water to boil. The resulting steam forces overlying water up through the conduit and onto the ground. This loss of water further reduces pressure within the conduit system, and most of the remaining water suddenly converts to steam and erupts at the surface.
Photograph by S.R. Brantley in September 1983
Castle Geyser erupts water and steam, Yellowstone National Park, Wyoming.
Did you know?
Geyser is an Icelandic word meaning "to gush or rush forth."
The world's premier geyser fields are in Iceland, New Zealand, and Yellowstone National Park, Wyoming.
Some geysers erupt from cold or warm springs and are powered by gas pressure instead of the actual boiling of water.
Most of the world's geysers are near regions of volcanic activity, which supply the heat needed to boil shallow ground water.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.


Look at other dictionaries:

  • geyser — [ ʒɛzɛr ] n. m. • 1824; 1783 n. pr.; mot angl., d o. islandaise 1 ♦ Source d eau chaude jaillissant par intermittence. Les grands geysers d Islande. 2 ♦ Grande gerbe jaillissante (d eau, de liquide, etc.). « Des gros obus tombaient [...]… …   Encyclopédie Universelle

  • Geyser — ist der Name folgender Personen: Christian Gottlieb Geyser (1742–1803), deutscher Maler und Kupferstecher Gottfried Geyser (1699–1764), deutscher lutherischer Theologe Joseph Geyser (1869–1948), deutscher Philosoph Maria Elisabeth Geyser… …   Deutsch Wikipedia

  • Geyser — Gey ser, n. [Icel. geysir, fr. geysa to rush furiously, fr. gj[=o]sa to gush. Cf. {Gush}.] A boiling spring which throws forth at frequent intervals jets of water, mud, etc., driven up by the expansive power of steam. [1913 Webster] Note: Geysers …   The Collaborative International Dictionary of English

  • Geyser — Geyser, s. Geijer …   Pierer's Universal-Lexikon

  • Geyser — Anthology Of The Icelandic Independent Music Scene Of The Eighties, lanzado en 1987 es una compilación de canciones donde aparecen bandas islandesas dentro de las cuales se encuentra KUKL, una banda que combinaba el rock, punk, jazz y música más… …   Wikipedia Español

  • geyser — → géiser …   Diccionario panhispánico de dudas

  • geyser — 1780, from Icelandic Geysir, name of a hot spring in the valley of Haukadal, lit. the gusher, from O.N. geysa to gush, from P.Gmc. *gausjan, from PIE *gheus , from root *gheu to pour (see FOUND (Cf. found) (2)) …   Etymology dictionary

  • geyser — |géizèr| s. m. O mesmo que gêiser.   ‣ Etimologia: palavra inglesa, do islandês Geysir …   Dicionário da Língua Portuguesa

  • geyser — The pronunciation in both its main meanings (‘hot spring’ and ‘heating apparatus’) is now gee zǝ, although giy zǝ is also used for the ‘hot spring’ meaning. In America and New Zealand, where the ‘heater’ meaning is not used, the pronunciation is… …   Modern English usage

  • geyser — [n] fountain gusher, hot spring, jet, spout, thermal spring; concepts 514,648 …   New thesaurus

  • geyser — ► NOUN 1) a hot spring in which water intermittently boils, sending a tall column of water and steam into the air. 2) Brit. a gas fired water heater. ORIGIN from the name of a particular spring in Iceland …   English terms dictionary

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