地层学

stratigraphy (geology)

-ly / structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct

earth / ground / field / place / land / CL:片[pian4]

to learn / to study / to imitate / science / -ology

to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers

stratum (geology)