a fine-grained basic laval rock consisting of pyroxene and nepheline
nephelinite in American English
(ˈnɛfəlɪnˌaɪt)
noun
a grayish, fine-grained or porphyritic igneous rock composed mainly of nepheline and pyroxene
Word origin
< nepheline + -ite1
nephelinite in American English
(ˈnefələˌnait)
noun
Geology
a fine-grained, dark rock of volcanic origin, essentially a basalt containing nepheline but no feldspar and little or no olivine
Derived forms
nephelinitic (ˌnefələˈnɪtɪk)
adjective
Word origin
[1860–65; nephelin(e) + -ite1]
Examples of 'nephelinite' in a sentence
nephelinite
Plugs of nephelinite and phonolitic nephelinite form the outermost ring of the complex.
S.G. Viladkar 1981, 'The carbonatites of Amba Dongar, Gujarat, India', Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume53/sgs_bt_053_1_pages_017_028.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)