also: しゃがん
noun
sandstone
A sedimentary rock composed mainly of sand-sized mineral particles or rock fragments. Common in geology and everyday contexts.
この地域の地層は主に砂岩でできている。
The strata in this area are mainly composed of sandstone.
砂岩は建築材料としてよく使われる。
Sandstone is often used as a building material.
From 砂 (sand) + 岩 (rock). The reading さがん is the standard Sino-Japanese on'yomi; しゃがん is a less common variant.