granophyre

[gran-uh-fahyuhr]
noun
a fine-grained or porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass.

Origin:
1880–85; grano- + -phyre

granophyric [gran-uh-fir-ik] , adjective
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World English Dictionary
granophyre (ˈɡrænəʊˌfaɪə)
 
n
a fine-grained granitic rock in which irregular crystals of intergrown quartz and feldspar are embedded in a groundmass of these minerals
 
[C19: from gran(ite) + -phyre after porphyry]
 
granophyric
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
granophyre   (grān'ə-fīr')  Pronunciation Key 
A fine-grained igneous rock that has large intergrown crystals of quartz and feldspar in the matrix.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

granophyre

fine-grained igneous rock that is characterized by a porphyritic texture, having large crystals (phenocrysts) that rest in a nonglassy, finely crystalline matrix (groundmass). Granophyre is similar to granite, except for its fine texture and smaller grain size; those granophyres that have quartz and alkali feldspar phenocrysts in a groundmass of quartz, alkali feldspar, and mafic (dark-coloured) minerals resemble rhyolite, while others consist of micropegmatite (q.v.).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Some thick bodies range from gabbro-diabase to granophyre.
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