denudation -
The act of stripping off covering, or removing the surface; a making bare.
denudation -
The laying bare of rocks by the washing away of the overlying earth, etc. ; or the excavation and removal of them by the action of running water.
Wikipedia
Denudation is the long-term sum of processes that cause the wearing away of the earth’s surface leading to a reduction in elevation and relief of landforms and landscapes. Endogenetic processes such as volcanoes, earthquakes, and plate tectonics uplift and expose continental crust to the exogenetic denudation processes of weathering, erosion, and mass wasting.