花か崗こう砂さ岩がん

Meanings

1

noun

arkose

geology

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

boulder, rock, cliff

砂さ岩がん
砂岩 is a general term for sandstone, while 花崗砂岩 specifically refers to arkose, a feldspar-rich sandstone derived from granite.
花か崗こう岩がん
花崗岩 is granite, the source rock from which arkose (花崗砂岩) is derived through weathering and sedimentation.

Compound of 花崗 (かこう, 'granite') and 砂岩 (さがん, 'sandstone'), reflecting its composition as a sandstone derived from granitic material.