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granophyre

[gran-uh-fahyuh r] /ˈgræn əˌfaɪər/
noun
1.
a fine-grained or porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass.
Origin
1880-1885
1880-85; grano- + -phyre
Related forms
granophyric
[gran-uh-fir-ik] /ˌgræn əˈfɪr ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for granophyre
  • Some thick bodies range from gabbro-diabase to granophyre.
British Dictionary definitions for granophyre

granophyre

/ˈɡrænəʊˌfaɪə/
noun
1.
a fine-grained granitic rock in which irregular crystals of intergrown quartz and feldspar are embedded in a groundmass of these minerals
Derived Forms
granophyric (ˌɡrænəʊˈfɪrɪk) adjective
Word Origin
C19: from gran(ite) + -phyre after porphyry
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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granophyre in Science
granophyre
  (grān'ə-fīr')   
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 Article for 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.).

Learn more about granophyre with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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