Item talk:Q41942

Mindat Description

Originally defined as a quartz mica rock but mostly used by geologists for schists dominated by mica, usually with major quartz

Geoscience Ontology Description

A schist that consists of more than 50 percent mica minerals, typically muscovite or biotite. Special type included to distinguish this common variety of schist. Include single subcategory of schist to indicate this common kind of schist. 'Mica rich metamorphic rock' for compound use with schist fabric term would be more compatible with treatment of blueschist (Glaucophane lawsonite epidote metamorphic rock) and greenschist (Chlorite actinolite epidote metamorphic rock), but based on the assumption that schist is the only rock type that will meet the mica-rich criteria, it seems reasonable to include as a subtype of schist.