Crevasse volcano

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Fissure eruption

A crevice volcano is a special type of volcano .

A central volcano also often has a system of columns, such as B. detectable at Krafla in Iceland .

A crevice volcano, on the other hand, does not (possibly yet) have a central tubular production vent . Instead, the lava flows out of an elongated fissure , which often creates a ridge with extensive lava fields . But it can just as well be a series of craters that are formed.

Fissure volcanoes can, for example, represent fissures connected to shield volcanoes, such as on Reykjanesskagi , or they can also be independent, such as at Alu in Ethiopia or at Mount Tarawera in New Zealand.

Individual evidence

  1. See Thor Thordarson, Armann Hoskuldsson: Iceland - Classic Geology in Europe 3. Harpenden 2002, pp. 144 ff.
  2. See also Krafla - Eruption History. Volcanic geology of Krafla - Námafjall. Vulcanological Institute, Univ. Iceland: "The structure of the neovolcanic zone in North Iceland is dominated by large swarms of faults and fissures which pass through a central volcano forming together a volcanic system." Retrieved June 29, 2011.
  3. Þórleifur Einarsson: Geology of Iceland. Rocks and Landscape. Reykjavík 1995, p. 61.

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