苦く鉄てつ質しつ

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

mafic

Geological term describing igneous rocks or minerals rich in magnesium and iron, typically dark-colored. Used attributively with の.

See also: 珪長質

• 玄げん武ぶ岩がんは苦く鉄てつ質しつの火か山ざん岩がんである。

  Basalt is a mafic volcanic rock.

• 苦く鉄てつ質しつ鉱こう物ぶつにはカンラン石せきや輝き石せきが含ふくまれる。

  Mafic minerals include olivine and pyroxene.