noun
differential erosion
Geological term referring to the uneven erosion of rock layers due to differences in hardness or resistance.
差別侵食によって、硬い岩層が尾根として残ることがある。
Due to differential erosion, harder rock layers can remain as ridges.
Compound of 差別 (differential) and 侵食 (erosion). The exact historical derivation is uncertain, but the term is a modern technical coinage.