from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fine-grained granite porphyry having a groundmass with irregular intergrowths of quartz and feldspar.
from The 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.
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.