TERMIUM Plus®

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KNOTTED SCHIST [1 record]

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Alphabetical list of terms

Record 1 2005-02-14

English

Subject field(s)
  • Petrography
DEF

A shaly, slaty, or schistose argillaceous rock the [knotted] appearance of which is the result of incipient growth of porphyroblasts in response to contact metamorphism of low to medium intensity.

OBS

Not to be confused with "spotted schist."

French

Domaine(s)
  • Pétrographie
CONT

Les schistes tachetés et les schistes noduleux présentent, respectivement, des taches ou des bombements foncés, mesurant de 1 à 10 mm ou davantage, dans lesquels le microscope décèle la présence de silicates spéciaux (andalousite, cordiérite) et de matière charbonneuse.

CONT

[...] schistes noduleux et micacés : la roche perd alors sa texture orientée régulière et il y a développement de micas et d'andalousite; [...]

Spanish

Campo(s) temático(s)
  • Petrografía
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