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PYROXENE-ANDESITE [1 record]

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Record 1 2009-05-20

English

Subject field(s)
  • Petrography
CONT

Andesites are called "pyroxene andesites" since the samples displaying porphyritic texture includes plagioclase and pyroxene crystals.

CONT

The rocks are named from other phenocryst phases; i.e a pyroxene-andesite will have phenocrysts of plagioclase and pyroxene.

OBS

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

French

Domaine(s)
  • Pétrographie
DEF

Roche, de couleur, gris claire, gris bleuâtre [dont] les phénocristaux de plagioclase de grandeur moyenne donnent près 24 à 30 % An [andésite].

CONT

Les coulées de lave en direction du Nord-Est dans le ruisseau Rukov sont un basalte à olivine et une andésite à pyroxène.

OBS

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

Spanish

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