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ORTHOGNEISS [1 record]

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Alphabetical list of terms

Record 1 2006-11-15

English

Subject field(s)
  • Petrography
DEF

Gneiss formed by squeezing (deformation and usually some recrystallization) of a granitic igneous plutonic rock.

OBS

Gneiss. ... They are orthogneiss if they derive from eruptive rock, and paragneiss when they derive from sedimentary rock and finally metagneiss when they originate from metamorphic rock.

OBS

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

French

Domaine(s)
  • Pétrographie
DEF

Gneiss caractérisant le métamorphisme de roches à l'origine magmatique (effusive ou plutonique).

OBS

Les gneiss dérivant d'anciennes roches sédimentaires sont dénommés paragneiss, ceux dérivant d'anciennes roches magmatiques orthogneiss.

OBS

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

Spanish

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