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ANDESITE PHENOCRISTAUX PLAGIOCLASE [3 records]

Record 1 2013-07-30

English

Subject field(s)
  • Petrography
DEF

An intermediate volcanic rock containing phenocrysts of very calcic plagioclase in a groundmass of labradorite, orthopyroxene, augite, magnetite, and abundant glass.

French

Domaine(s)
  • Pétrographie
DEF

Andésite, contenant des phénocristaux de plagioclase.

OBS

La pâte, riche en verre, présente des microlites de labrador et d’enstatite-augite.

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Variedad de andesita que contiene fenocristales, microlitos de labrador y de enstatita y mucho vidrio.

Save record 1

Record 2 2011-01-30

English

Subject field(s)
  • Petrography
CONT

Plagioclase Porphyry Andesite. - The rock contains phenocrysts of plagioclase, quartz, and sphene. Plagioclase (30%) phenocrysts are up to 4 mm across, with irregular to subhedral shapes. Some are glomeroporphyritic.

CONT

The Nicola volcanic flows comprise augite porphyry andesite, plagioclase porphyry andesite and fine-grained andesite.

OBS

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

Key term(s)
  • plagioclase-porphyry andesite

French

Domaine(s)
  • Pétrographie
OBS

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

Spanish

Save record 2

Record 3 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 3

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