Granophyre

Granophyre (aɪər {Respell|GRAN|ə-fyr}; from granite and porphyry) is a subvolcanic rock that contains quartz and alkali feldspar in characteristic angular intergrowths such as those in the accompanying image. The texture is called granophyric. The texture can be similar to micrographic texture and to the coarser graphic intergrowths of quartz a...
Found on http://en.wikipedia.org/wiki/Granophyre

granophyre

fine-grained igneous rock that is characterized by a porphyritic texture, having large crystals (phenocrysts) that rest in a nonglassy, finely ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/g/59
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