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A dark, glass-rich igneous rock with abundant large crystals of olivine and pyroxene and with little or no feldspar.
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 It might be outdated or ideologically biased.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 Mount Limburg in the Kaiserstuhl massif, Federal Republic of Germany), an igneous rock, an effusive analogue of alkali rocks, rich in dark-colored minerals. Limburgite is a vitrophyric rock with olivine and augite phenocrysts. The groundmass consists of a vitreous base of alkaline composition which may contain nepheline and plagioclase and microlites of augite and occasionally amphibole, hauyne, and leucite.

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