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APHYRIQUE [1 record]

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Record 1 2017-05-12

English

Subject field(s)
  • Petrography
DEF

[Said of] a volcanic rock texture with no phenocrysts.

OBS

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

French

Domaine(s)
  • Pétrographie
DEF

Se dit de la structure d'une roche formée de cristaux minuscules et qui peut n'avoir pas subi de cristallisation profonde.

CONT

Si enfin la lave est formée exclusivement de cristaux minuscules, à peine visibles à l'œil nu (structure dite aphyrique), il est probable que le liquide n'a pas subi de cristallisation partielle en profondeur.

OBS

Antonyme : porphyrique.

OBS

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

Spanish

Campo(s) temático(s)
  • Petrografía
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