TERMIUM Plus®

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AUGEN GNEISS [1 record]

Record 1 2009-01-20

English

Subject field(s)
  • Petrography
DEF

A gneiss with large almond-shaped or eye-like kernels of certain constituents, such as quartz and feldspar, dispersed through a finer matrix.

OBS

Augen-gneiss results from the regional metamorphism of granitic rocks or by injection processes.

OBS

augen gneiss: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
DEF

[Gneiss] à lentilles ovoïdes (1-5 cm) constituées par des porphyroblastes de feldspath ou des amas granoblastiques quartz-feldspath.

CONT

D'après leur structure, on distingue notamment les gneiss oeillés ou glanduleux, où les yeux sont formés par de gros cristaux de feldspath entouré de mica noir, et les gneiss porphyroïdes qui présentent de gros cristaux de quartz ou de feldspath.

OBS

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

Spanish

Campo(s) temático(s)
  • Petrografía
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