Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A fine-grained granite porphyry having a groundmass with irregular intergrowths of quartz and feldspar.
Century Dictionary and Cyclopedia
- n. In lithology, the ground-mass of the porphyritic rocks when this is made up either entirely or almost, entirely of a crystalline mixture of the component minerals. The term was introduced by Vogelsang. For a rock having an imperfectly crystallized magma as its ground-mass, the same author proposed the term felsophyre, and for an entirely vitreous magma, vitro-phyre. The granophyre texture is analogous to the granitic or granitoid in the granitic family of rocks.
Etymologies
- German Granophyr : grano-, grano- + (Por)phyr, porphyry (from Medieval Latin porphyrium; see porphyry). (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Mount Barney itself is a mountain mass composed of granophyre, about 24 million years old.”
“Abstracts on origin of granophyre at Alid volcanic center (or photos of granophyre).”
“A-type granophyre and rhyolite from the Alid volcanic center, Eritrea, northeast Africa.”
“A full article on the Alid granophyre is available in the December 1997 issue of the”
“Blocks of anorthoclase - and clinopyroxene-bearing micorgaphic granophyre (click for photo) were ejected with rhyolitic pumice during a late-Pleistocene eruption at the Alid volcanic center, Eritrea.”
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