planation

The process of erosion and deposition in which a nearly level surface is produced, as by streams, wind, or ocean currents.

The act of planing or making plane or flat; specifically, in geology, the erosive process by which a stream or a glacier produces a nearly level surface; also the result of erosive processes.

The formation of a flat surface by erosion and deposition.

The morphological transformation of a three-dimensional structure into a two-dimensional one through development or evolution.

The process of erosion whereby a level surface is produced.