More Like This

Show all results sharing this subject:

  • Earth Sciences and Geography


Show Summary Details

Quick Reference

A medium-grained, dark-coloured, regional metamorphic rock composed of hornblende and plagioclase with minor epidote, sphene, biotite, and quartz. The rock may show a well-developed planar or linear alignment of elongate hornblende crystals as a result of suffering deformation at the same time as regional metamorphism. These alignments define fabrics within the rock known as schistosity and lineation respectively. Amphibolites are formed by medium-grade metamorphism of basic igneous rocks such as basalts, both extrusive and intrusive types.

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.