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ophitic

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ophitic [ä′fid·ik]
(petrology)
Of the holocrystalline, hypidiomorphic-granular texture of an igneous rock, exhibiting lath-shaped plagioclase crystals partly or wholly included within pyroxene crystals.
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Phenocryst sequence = olivine, Phenocryst sequence = olivine, augite, plagioclase such that plagioclase, augite locally plagioclase phenocrysts are less yielding ophitic and subophitic common than in tholeiites.
Celestial climate driver: a perspective from four billion years of ... by Veizer, Jan / Geoscience Canada
These zones also control the location of minor bodies of rapakivi in southern Finland and an ophitic gabbro body (Sigula) in the Tallinn zone.
Outlines of the Precambrian basement of Estonia/Eesti eelkambriumi ... by Soesoo, Alvar; Puura, Vaino; Kirs, Juho; Petersell, Valter; Niin, Mati; All, Tarmo / Proceedings of the Estonian Academy of Sciences: Geology
The flow is a coarse-grained, ophitic basalt containing heavily altered plagioclase and relatively unaltered clinopyroxene.
Geological Sciences by Michigan Academician
 
 
 
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