火か山ざん岩がん

noun

volcanic rock

General term for rock formed from cooled magma or lava. Used in geology and everyday contexts.

• この地ち域いきには火か山ざん岩がんが多おおく見みられる。

  Volcanic rock is commonly found in this region.

• 火か山ざん岩がんはマグマが冷ひえて固かたまったものです。

  Volcanic rock is formed when magma cools and solidifies.