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MAGMA RHYOLITIQUE [1 record]

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Record 1 2008-08-15

English

Subject field(s)
  • Vulcanology and Seismology
  • Geochemistry
DEF

A magma which contains greater than 68% silica by weight.

CONT

Rhyolite magma is rich in silicon, potassium and sodium and erupts at temperatures between 700°C and 850°C as an extremely viscous (sticky) magma. Rhyolite magma containing lots of gas bubbles cools to form pumice. Because it is low in iron, rhyolite is normally light-coloured - it may vary from white to pink or brown.

OBS

rhyolite magma: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Volcanologie et sismologie
  • Géochimie
CONT

Ce magma rhyolitique possède une très forte viscosité, responsable de son émission actuelle sous forme d'un dôme [...]

OBS

magma rhyolitique : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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