noun
sedimentary rock
Rare synonym for 堆積岩 (たいせきがん). Used mainly in older or specialized geological texts.
See also: 堆積岩
この地層には沈積岩が多く見られる。
Sedimentary rocks are often found in this stratum.
堆積岩 is the standard modern term for sedimentary rock; 沈積岩 is a rare variant.
Compound of 沈 (ちん, 'sink, settle') + 積 (せき, 'accumulate') + 岩 (がん, 'rock'). The exact origin is uncertain; it is a rare synonym for 堆積岩.