TERMIUM Plus®

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

CROUTE GRANITIQUE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-10-26

English

Subject field(s)
  • Tectonics
DEF

A petrologic name for the lower layer of the Earth's crust, composed of rocks that are rich in silica and magnesia.

OBS

It is equivalent to the oceanic crust and to the lower portion of the continental crust, underlying the sial.

OBS

Etymology: an acronym for silica + magnesia.

French

Domaine(s)
  • Tectonique
DEF

Ensemble de roches assez basiques, riches en silice et magnésium, situées en dessous du sial.

CONT

Sous la croûte granitique sialitique, constituant l'armature des continents, existe une couche probablement continue, alimentant la plupart des volcans, et qu'on désigne sour le nom de sima(de silicium et de magnésium).

OBS

Constitue avec le sial la croûte terrestre.

Spanish

Campo(s) temático(s)
  • Tectónica
DEF

Capa de la corteza terrestre de naturaleza basáltica, situada debajo del sial.

CONT

El sima, voz formada con las primeras letras de sílice y magnesio, consta sobre todo de sílice, magnesia y, en menores proporciones, óxidos de hierro. Su densidad se halla comprendida entre 2,8 y 3,6, lo cual hace que sobre esa capa pueda flotar el sial, que es menos denso. El límite entre ambos es la discontinuidad de Conrad.

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Record 2 2004-10-26

English

Subject field(s)
  • Plate Tectonics
DEF

... the upper layer of the Earth's crust, composed of rocks that are rich in silica and alumina.

OBS

Sial is the less dense continental crust. It is called sial because it's rich in silica and aluminium. It is composed of granitic rocks that form the continents.

OBS

granitic layer: A synonym of sial, so named for its supposed petrologic composition.

French

Domaine(s)
  • Tectonique des plaques
DEF

[...] couche de la lithosphère composée en grande partie de silicates d’aluminium.

CONT

Le Sial ne forme pas une couche continue, mais des blocs isolés qui flottent sur la couche inférieure ou Sima [...]

OBS

sial : terme [...] introduit en 1909 (abréviation de silice-aluminium) [...] La terre était alors considérée comme formée de trois couches concentriques : sial, sima et nife. Ancienne orthographe : sal.

Spanish

Campo(s) temático(s)
  • Tectónica de placas
DEF

Parte superficial de la corteza terrestre, en cuya composición predominan la sílice y la alúmina.

CONT

El sial, voz formada con las primeras letras de las palabras sílice y alúmina, consta sobre todo de granito y granodioritas. Su densidad es, en promedio, de 2,7, lo cual hace que flote en cierto modo sobre el sima, más denso, del cual se halla separado por la discontinuidad de Conrad.

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