粘ねん板ばん岩がん

noun

slate; clay rock

A fine-grained metamorphic rock derived from shale or clay; used for roofing, blackboards, and writing tablets. In geology, 粘板岩 is the standard Japanese term for slate.

• この地ち域いきの粘ねん板ばん岩がんは屋や根ね材ざいとしてよく使つかわれる。

  The slate from this region is often used as roofing material.

• 粘ねん板ばん岩がんはもともと泥どろや粘ねん土どが堆たい積せきしてできた岩がん石せきだ。

  Slate is a rock originally formed from accumulated mud and clay.