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Dark dike rocks consisting mostly of biotite, plagioclase, and augite.
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 It might be outdated or ideologically biased.



(named after the village of Kersanton in Brittany, France), a veined magmatic rock consisting of biotite (comprising about one-third of the rock), quartz, and acid plagioclase, and sometimes also magnetite and apatite. There are varieties of kersantite which, in addition to biotite, contain a small amount of pyroxene and amphibole. The kersantites are genetically associated with granites and rocks similar to them. The difference between kersantites and granites is caused by the processes of differentiation and assimilation.

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