allotriomorphic


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allotriomorphic

[ə¦lä·trē·ə¦mȯr·fik]
(mineralogy)
Of minerals in igneous rock not bounded by their own crystal faces but having their outlines impressed on them by the adjacent minerals. Also known as anhedral; xenomorphic.
References in periodicals archive ?
Jijal ultramafic rocks are medium to coarse grained and have hypidiomorphic texture whereas chromite mostly has allotriomorphic texture.
Less visible is the shape preferred orientation of quartz and feldspar, which is mainly caused by an allotriomorphic habitus (in the case of quartz), and alteration (sericitisation of feldspars).
allotriomorphic to hypidiomorphic equigranular; locally inequigranular 3 Carrying Cove m.
Most rocks under the microscope are medium-grained hypidiomorphic to allotriomorphic subequigranular and composed of plagioclase hornblendic amphibole opaque iron oxide quartz and in some biotite titanite and rare perthite.
Most of them correspond to coarse-grained diorite and gabbro with phaneritic allotriomorphic texture (Fig.