Albitophyre

albitophyre

[al′bid·ə‚fīr]

(petrology)

A porphyritic rock that contains albite phenocrysts in a groundmass composed mostly of albite.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Albitophyre

 

(also keratophyre), a magmatic rock of porphyritic structure. Porphyritic formations and the tiniest crystals or microlites of the predominant rock mass appear as albite. Albitophyres are formed in the metamorphosis of a lava stream of trachyte and andesite. They are commonly found among ancient effusive formations of the Urals, Kazakhstan, and the Caucasus.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.