塩えん基き性せい岩がん

noun

basic rock

Geological term for igneous rock with a relatively low silica content, typically rich in magnesium and iron.

• 玄げん武ぶ岩がんは代だい表ひょう的てきな塩えん基き性せい岩がんの一ひとつです。

  Basalt is one of the typical basic rocks.