poikilitic


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Related to poikilitic: ophitic, trachytic, poikiloblastic

poikilitic

(ˌpɔɪkɪˈlɪtɪk)
adj
(Geological Science) geology relating to the presence of crystals within the structure or texture of a rock, or specifically to the Permo-Triassic system of rocks
References in periodicals archive ?
Schistose amphibolite and metagabbro are represented by fine-grained, equigranular rocks of granonematoblastic, nematoblastic, relict gabbro, poikilitic texture.
In some rocks, the perthite is poikilitic and encloses plagioclase and quartz grains.
The gypsum crystals are often poikilitic but with an occasional lozenge-shaped crystalline habit and there are anhydrite relicts within some gypsum crystals.
9), while amphibole and sanidine appear as interstitials sometimes developing poikilitic crystals.
("Poikilitic" refers to a texture in which small crystals of one mineral are irregularly scattered within a larger anhedral crystal of another mineral.) The name, given by Kupletsky in 1932, is for Rischorr in the Khibina complex, Kola Peninsula, Russia.
Large poikilitic hornblende and in some cases plagioclase overgrow the cumulates.
In the course of further evolution, the grains become poikilitic and finally autonomous and almost free of inclusions.