花か崗こう砂さ岩がん

noun

arkose

A type of sandstone rich in feldspar, typically formed from the weathering of granite. Used in geology.

• この地ち域いきの花か崗こう砂さ岩がんは長ちょう石せきを多おおく含ふくんでいる。

  The arkose in this region contains a lot of feldspar.