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Related to Hypidiomorphic: Allotriomorphic


a.1.(Crystallog.) Partly idiomorphic; - said of rock a portion only of whose constituents have a distinct crystalline form.
References in periodicals archive ?
Thin sections of bedrock samples taken from random locations in the Scrag Lake pluton outside of the North structure consist of medium- to coarse-grained hypidiomorphic biotite monzogranite.
They are medium to fine grain-sized, with equigranular and occasionally porphyritic hypidiomorphic textures (up to 10% of plagioclase phenocrysts).
In thin section, large perthitic K-feldspar megacrysts are in a hypidiomorphic granular matrix of normal to oscillatory zoned oligoclase, perthitic orthoclase-microcline, quartz, dark brown to orange-brown biotite, pinitized cordierite, and minor muscovite.