Definition of nephelinite in English:

nephelinite

noun

mass nounGeology
  • A fine-grained basaltic rock containing nepheline in place of plagioclase feldspar.

    • ‘The lava flows within the pyroclasts are composed of nephelinite and phonolite.’
    • ‘Another New Zealand locality for this type of nephelinite is in the Auckland Domain.’
    • ‘The composition studied has very low albite and is classified as transitional between olivine nephelinite and nepheline-rich basanite.’
    • ‘Geochemically, the pyroxene nephelinite is highly enriched in LILE compared with the first one.’
    • ‘Magma modelling showed that olivine nephelinite and basanite could form by different degrees of partial melting of the mantle source, with amphibole, garnet, olivine and clinopyroxene in the residuum.’

Pronunciation

nephelinite

/ˈnɛf(ə)lɪnʌɪt/