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QUARTZ PORPHYRITE [1 record]

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Alphabetical list of terms

Record 1 1977-10-20

English

Subject field(s)
  • Geology
OBS

A porphyrite carrying quartz as an accessory constituent; the representative in the medium-grain size group of the fine-grained dacite.

French

Domaine(s)
  • Géologie
OBS

C'est une roche effusive paléovolcanique, avec la même composition que les diorites quartzifères et un aspect analogue aux porphyres quartzifères.

Spanish

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