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GRANITOID [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-07-13

English

Subject field(s)
  • Petrography
DEF

A term loosely applied to any light-colored, coarse-grained plutonic rock containing quartz as an essential component, along with feldspar and mafic minerals.

French

Domaine(s)
  • Pétrographie
DEF

Roche du groupe des granites [ou] roche plutonique apparentée génétiquement aux granites.

CONT

En vertu des associations rencontrées dans la nature, nous comprendrons assez largement le terme de granite, qui pourra englober des roches quartziques faisant transition avec d'autres roches plutoniques : transition à des syénites par diminution de la proportion de quartz; à des diorites quartziques par accroissement de celle des plagioclases. On emploie [...] la dénomination de «granitoïdes» pour l'ensemble de ce genre de roches qui comprend naturellement les granites proprement dits.

OBS

granitoïde (adj.): Se dit d'une roche qui a l'aspect du granite.

Spanish

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