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OPHITIC [1 record]

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Alphabetical list of terms

Record 1 2017-05-11

English

Subject field(s)
  • Petrography
DEF

Said of the holocrystalline, hypidiomorphic-granular texture of an igneous rock (especially diabase) in which lath-shaped plagioclase crystals are partially or completely included in pyroxene crystals (typically augite).

OBS

Also, said of a rock exhibiting ophitic texture, or, rarely, of a rock involving other pairs of minerals.

French

Domaine(s)
  • Pétrographie
CONT

La texture «ophitique» [...] se rencontre dans certaines «dolérites» [...]. Les plagioclases y forment de grands cristaux rectangulaires de 2 à 5 mm qui dessinent une charpente dont les mailles sont occupées par des cristaux plus petits, non visibles à l'œil nu, avec ou sans verre. Cette texture ophitique révèle qu'il y a eu deux temps principaux de cristallisation.

Spanish

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