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