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EPANCHEMENT BASALTO-ANDESITIQUE [1 record]

Record 1 2011-01-05

English

Subject field(s)
  • Vulcanology and Seismology
  • Petrography
CONT

A basaltic andesite flow was emplaced over the tephra, heating and fusing it into a coherent mass. Emplacement of the basaltic andesite caused secondary mobilization of the fusing tephra resulting in the distorted layering (flow-banding) observed in the fused tuff. The basaltic andesite also partly mixed with the rhyolitic liquid to produce a thin zone of dacite.

OBS

basaltic andesite flow: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Volcanologie et sismologie
  • Pétrographie
CONT

C'est le début d'édification d'un strato-volcan, par l'épanchement de coulées de basaltes andésitiques et d'andésite.

CONT

Au Miocène moyen et supérieur prédominent surtout les coulées andésitiques et basaltiques tandis qu'au Pliocène supérieur on observe les coulées vitrifiées de pechsteins et d'obsidiennes.

OBS

coulée basalto-andésitique : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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