Limburgite


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limburgite

[′lim·bər‚gīt]
(petrology)
A dark, glass-rich igneous rock with abundant large crystals of olivine and pyroxene and with little or no feldspar.

Limburgite

 

(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.