Overview

trachybasalt


Show Summary Details

Quick Reference

The fine-grained, extrusive equivalent of syenogabbro. When undersaturated, feldspathoidal minerals take the place of alkali feldspar to generate feldspathoidal trachybasalts known as tephrites (olivine-free) and basanites (olivine present). Trachybasalts are found on the stable continental crust and on some oceanic islands.

Subjects: 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.