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AUGITE PORPHYRY FACIES [1 record]

Record 1 2008-10-10

English

Subject field(s)
  • Petrography
CONT

Augite Porphyry Facies: Augite porphyry lava (tephrite) is present in a small area ... accompanied by some light-coloured sedimentary and pyroclastic rocks. The augite porphyry is massive, dense, dark brown, and contains characteristic large euhedral augite crystals embedded in a fine-grained matrix. Structures such as columnar jointing, flow breccia, and amygdales are only locally well developed.

OBS

augite porphyry facies: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
OBS

Le faciès porphyrique côtoie par endroit, la diabase rougeâtre à verdâtre. Au contact, la diabase porphyrique présente parfois une mince bordure de refroidissement. [...] Dans la majorité des cas, le plagioclase, l'augite et l'épidote avec plus ou moins de chlorite, de sphène-leucoxène et d'ilménite sont les constituants principaux.

OBS

faciès à phénocristaux d'augite : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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