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 ?
3) Quartz occurs as cloudy anhedral grains with characteristic weak birefringence, prominent undulose extinction and low relief while muscovite occurs as tiny elongate plates with poikilitic crystals of quartz.
Large poikilitic hornblende and in some cases plagioclase overgrow the cumulates.
5a), locally reaching 20 cm, and they sometimes have ragged poikilitic margins containing uniformly distributed inclusions of matrix minerals.