olivine nephelinite


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Related to olivine nephelinite: norite, phonolite, Carbonatites

olivine nephelinite

[′äl·ə‚vēn nə′fel·ə‚nīt]
(petrology)
An extrusive igneous rock differing in composition from nephelinite only by the presence of olivine. Also known as ankaratrite; nepheline basalt.