岩がん脈みゃく

noun

dike; dyke

Geological term for a sheet of rock that formed in a fracture in a pre-existing rock body.

• この地ち域いきには、玄げん武ぶ岩がんの岩がん脈みゃくが多おおく見みられる。

  Many basalt dikes can be seen in this area.