成せい層そうせいそうMeanings1nounstratificationTechnical term used in geology, meteorology, and other sciences to describe layered structures.地ち層そうの成せい層そうを観かん察さつする。Observe the stratification of the geological layers.成せい層そう圏けんは大たい気きの層そうの一ひとつだ。The stratosphere is one of the atmospheric layers.