Overview

basanite


Show Summary Details

Quick Reference

An extrusive, mafic igneous rock consisting of a feldspathoid mineral (nepheline, analcite, or leucite), olivine, plagioclase feldspar, pyroxene, and minor accessory minerals. Essentially, the mineralogy is that of a basalt, with the addition of a feldspathoid mineral and olivine. Varieties of basanites are defined by the type of feldspathoid mineral present to give nepheline-basanite, analcite-basanite, and leucite-basanite. These rocks are found in close association with alkali basalts. See also trachybasalt.

Subjects: Art — Earth Sciences and Geography.


Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.