orthoamphibolite
English
[edit]Etymology
[edit]From ortho- + amphibolite.
Noun
[edit]orthoamphibolite (plural orthoamphibolites)
- (petrology) Metamorphic rock composed mostly of amphibole, plagioclase, with lesser amounts of epidote, zoisite, chlorite, quartz, titanite, and accessory leucoxene, ilmenite and magnetite derived from an igneous rock.