noun
hornblende schist
A metamorphic rock composed mainly of hornblende and plagioclase, often with a schistose texture. Used in geology and mineralogy.
この地域の地質は主に角閃片岩からなる。
The geology of this area consists mainly of hornblende schist.
Compound of 角閃 (hornblende) + 片岩 (schist). The exact historical derivation is uncertain; the spelling is conventionally associated with the mineralogical meaning.