Definitions for poikilitic

This page provides all possible meanings and translations of the word poikilitic

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  1. poikilitic(Adjective)

    Describing the texture of an igneous rock that has small crystals of one mineral scattered among larger crystals of another

Webster DictionaryRate this definition:(0.00 / 0 votes)

  1. Poikilitic(adj)

    see Poecilitic

FreebaseRate this definition:(0.00 / 0 votes)

  1. Poikilitic

    Poikilitic texture refers to crystals, typically phenocrysts, in an igneous rock which contain small grains of other minerals. The texture is most easily observed in petrographic thin sections. In some rocks there seem to be little tendency for the minerals to envelop one another. This is true of many gabbros, aplites and granites. The grains then lie side by side, with the faces of the latter moulded on or adapted to the more perfect crystalline outlines of the earlier. When the smaller idiomorphic crystals of the first-formed are scattered irregularly through the larger and less perfect crystals of later origin, the structure is said to be poikilitic. A poikioblast is a larger crystal that contains smaller crystals of other minerals. Poikioblasts are a texture of metamorphic rocks.


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