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What does nephelinite mean?

Looking for the meaning or definition of the word nephelinite? Here's what it means.

Noun
  1. (geology) A dark, finely crystalline rock of volcanic origin, being a mixture of nepheline and pyroxene.
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Geochemically, the pyroxene nephelinite is highly enriched in LILE compared with the first one.
Rounded, yellow, weathered peridotite xenolith in a nephelinite lava flow at Kaiserstuhl, SW Germany.
The composition studied has very low albite and is classified as transitional between olivine nephelinite and nepheline-rich basanite.
Another New Zealand locality for this type of nephelinite is in the Auckland Domain.
They are chiefly leucite and nepheline rocks, such as leucitite, leucitophyre and nephelinite, but basalt and trachyte also occur.
The lava flows within the pyroclasts are composed of nephelinite and phonolite.

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