poikiloblast


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poikiloblast

[pȯi′kil·ə‚blast]
(geology)
A large crystal (xenoblast) formed by recrystallization during metamorphism and containing numerous inclusions of small idioblasts.
References in periodicals archive ?
Garnet is sometimes found as inclusions within the staurolite poikiloblasts, which indicates that the rock from the staurolite zone first crossed a garnet-in reaction.
Coronitic Fe-Ti gabbro is transformed to amphibolite at deformed margins and contains clinopyroxene-bearing leucosomes with garnet poikiloblasts that are indicative of high-PT dehydration melting.