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nephelinite
[ nef-uh-luh-nahyt ]
noun
, Petrography.
- a fine-grained, dark rock of volcanic origin, essentially a basalt containing nepheline but no feldspar and little or no olivine.
nephelinite
/ ˈnɛfɪlɪˌnaɪt /
noun
- a fine-grained basic laval rock consisting of pyroxene and nepheline
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Other Words From
- neph·e·li·nit·ic [nef-, uh, -l, uh, -, nit, -ik], adjective
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Word History and Origins
Origin of nephelinite1
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Example Sentences
They are chiefly leucite and nepheline rocks, such as leucitite, leucitophyre and nephelinite, but basalt and trachyte also occur.
From Project Gutenberg
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