岩がん石せき層そう

Meanings

1

rock formation; rock strata; lithological layer

Geological term referring to a layer or sequence of rock. Used in scientific and descriptive contexts.

この地ち域いきの岩がん石せき層そうは約やく1いち億おく年ねん前まえに形けい成せいされた。
The rock strata in this area were formed about 100 million years ago.
地ち質しつ学がく者しゃは岩がん石せき層そうを調ちょう査さして過か去この環かん境きょうを推すい定ていする。
Geologists study rock formations to infer past environments.