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ANDESITE PYROXENE [2 records]

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

Save record 1

Record 2 2002-04-17

English

Subject field(s)
  • Petrography

French

Domaine(s)
  • Pétrographie
DEF

[...] andésite dont le plagioclase est une andésine, et le ferromagnésien un pyroxène peu calcique.

OBS

[L’islandite] est plus pauvre en alumine et plus riche en fer que les andésites connues dans les chaînes de montagne péripacifiques.

Spanish

Save record 2

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