地ち層そう学がくMeanings1nounstratigraphygeologyTechnical term in geology for the study of rock layers and layering.地ち層そう学がくは、地ち層そうの形けい成せい過か程ていや年ねん代だいを研けん究きゅうする学がく問もんです。Stratigraphy is the study of the formation processes and ages of rock layers.
