珪けい長ちょう質しつ

noun which may take the genitive case particle 'no', noun

felsic

Geological term describing igneous rocks or magmas rich in silica and feldspar, contrasting with mafic (苦鉄質). Used as a noun or with の to modify other nouns.

See also: 苦鉄質

• 花か崗こう岩がんは珪けい長ちょう質しつの火か成せい岩がんの代だい表ひょう例れいだ。

  Granite is a typical example of a felsic igneous rock.