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GNEISS PORPHYROIDE [1 record]

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Record 1 1997-10-07

English

Subject field(s)
  • Petrography
OBS

porphyroid (adj.): Said of or pertaining to ... a blastoporphyritic of sometimes porphyroblastic metamorphic rock of igneous origin....

French

Domaine(s)
  • Pétrographie
CONT

Il existe de nombreuses variétés de gneiss : [...] "Gneiss porphyroïde" : à gros cristaux de quartz ou de feldspath.

Spanish

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