porphyroblastic


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Related to porphyroblastic: Porphyroblastic Texture, poikiloblastic

porphyroblastic

[pȯr¦fir·ə¦blas·tik]
(petrology)
Pertaining to the texture of recrystallized metamorphic rock having large idioblasts of minerals possessing high form energy in a finer-grained crystalloblastic matrix.
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References in periodicals archive ?
Garnet-bearing amphibole schists exhibit schistose structure defined by the alignment of actinolite, hornblende and chlorite and granonematoblastic and locally porphyroblastic and poiquiloblastic textures.
Petrology, geochemistry and geochronology of the Arquia Complex's metabasites at the Pijao-Genova sector, Central Cordillera, Colombian Andes
The existent textures include nematoblastic, granoblastic, porphyroblastic and poikiloblastic.
Pressure-temperature path of Arquia Group rocks (NW Colombia): a petrographic analysis from mineral assemblages
In the outer nodule zones, dark envelopes comprised of porphyroblastic crystals of secondary gypsum are common; inside these porphyroblasts, abundant relics of anhydrite were observed petrographically.
La unidad Yesos de Ninyerola: un ejemplo de sedimentacion ciclica lacustre (Mioceno Medio, E Espana)
Textures in staurolite-oligoclase porphyroblastic p elite within the Cranberry Point Shear Zone indicate peak metamorphism was synchronous with localized crenulation of S1 around steep axes.
Atlantic Geoscience Society
They are porphyroblastic, fine grained, and consist of hornblende and actinolite in a quartzfeldspathic matrix, with subordinate chlorite, epidote, calcite, and titanite.
Las rocas intrusivas basicas-ultrabasicas del Complejo Estratificado del Vizcaino y la ofiolita del Vizcaino (Baja California Sur, Mexico)

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