granophyre

granophyre
—granophyric /gran'euh fir"ik/, adj.
/gran"euh fuyeur'/, n.
a fine-grained or porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass.
[1880-85; GRANO- + -PHYRE]

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▪ rock
      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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Universalium. 2010.

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  • Granophyre — ( point, perhaps in the presence of a water rich phase.Granophyres typically are intrusive rocks that crystallized at shallow depths, and many have compositions similar to those of granites. A common occurrence of granophyre is within layered… …   Wikipedia

  • granophyre — ● granophyre nom masculin (de porphyre) Granite à texture microgrenue dans lequel quartz et feldspaths ont syncristallisé sous forme de micropegmatites …   Encyclopédie Universelle

  • granophyre — [gran′ōfīr΄] n. [Ger granophyr, arbitrary blend < granit, GRANITE + porphyr, PORPHYRY] an igneous rock similar to granite in composition and appearance, but containing larger crystals of quartz and feldspar in a matrix of a finer grain… …   English World dictionary

  • granophyre — noun Etymology: International Scientific Vocabulary, from grano + French phyre (as in porphyre porphyry) Date: 1882 a porphyritic igneous rock chiefly of feldspar and quartz with granular groundmass • granophyric adjective …   New Collegiate Dictionary

  • granophyre — gran·o·phyre …   English syllables

  • granophyre — gran•o•phyre [[t]ˈgræn əˌfaɪər[/t]] n. pet a porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass • Etymology: 1880–85; grano + F (por)phyre porphyry gran o•phy′ric ˈfɪr ɪk adj …   From formal English to slang

  • granophyre — /ˈgrænəfaɪə/ (say granuhfuyuh) noun a fine grained or porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass. {German Granophyr, from grano (combining form of Granit granite) + (Por)phyr porphyry} –granophyric …  

  • granophyre — ˈgranəˌfī(ə)r noun ( s) Etymology: International Scientific Vocabulary grano + phyre; originally formed as German granophyr : a porphyritic igneous rock chiefly composed of alkalic feldspar and quartz and having a granular groundmass; also : a… …   Useful english dictionary

  • Micrographic texture — In petrology, micrographic texture is a fine grained intergrowth of quartz and alkali feldspar, interpreted as the last product of crystallization in some igneous rocks which contain high or moderately high percentages of silica. Micropegmatite… …   Wikipedia

  • Misquah Hills — Coordinates: 47°59′N 90°34′W / 47.98°N 90.56°W / 47.98; 90.56 …   Wikipedia

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