from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A fine-grained granite porphyry having a groundmass with irregular intergrowths of quartz and feldspar.

from The Century Dictionary.

  • noun 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.


from The American Heritage® Dictionary of the English Language, 4th Edition

[German Granophyr : grano-, grano- + (Por)phyr, porphyry (from Medieval Latin porphyrium; see porphyry).]


  • Mount Barney itself is a mountain mass composed of granophyre, about 24 million years old.

    Central Eastern Rainforest Reserves, Australia

  • Abstracts on origin of granophyre at Alid volcanic center (or photos of granophyre).

    The Alid Page

  • 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.



Log in or sign up to get involved in the conversation. It's quick and easy.