TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

EYE STRUCTURE [1 record]

Record 1 1999-10-09

English

Subject field(s)
  • Mineralogy
  • Petrography
DEF

In some gneissic and schistose metamorphic rocks, a structure consisting of minerals like feldspar, quartz, or garnet that have been squeezed into elliptical or lens-shaped forms resembling eyes (augen), which are commonly enveloped by essentially parallel layers of contrasting constituents such as mica or chlorite.

French

Domaine(s)
  • Minéralogie
  • Pétrographie
DEF

[...] texture de certains gneiss dans lesquels les feldspaths et le quartz présentent la forme d'yeux plus ou moins allongés.

CONT

La texture oeillée s'observe souvent dans les gneiss [...] où elle résulte de la déformation plastique, plus ou moins intense, de roches éruptives renfermant de grands cristaux de feldspaths (phénocristaux) avec recristallisation partielle : d'où la présence «d'yeux» feldspathiques.

CONT

Lorsque certains minéraux, ou groupements de minéraux [...] forment des nodules alignés pouvant atteindre 1 à 3 cm de diamètre on a une texture oeillée (gneiss).

Spanish

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