Technical term used in geology, meteorology, and other sciences to describe layered structures.
地層の成層を観察する。
Observe the stratification of the geological layers.
成層圏は大気の層の
The stratosphere is one of the atmospheric layers.
stratosphere
marine deposit; marine sedimentary layer
stratovolcano; composite volcano
polar stratospheric cloud
Compound of 成 (become, form) and 層 (layer). The exact historical derivation is uncertain, but the word is used in modern scientific contexts.