Another word for erosional

Erosional processes have transported small soil particles downslope, while larger rocks and artifacts remained at or near the top of the knoll.

The plains are by no means a simple unit; they are of diverse structure and of various stages of erosional development; they are occasionally interrupted by buttes and escarpments; they are frequently broken by valleys: yet on the whole a broadly extended surface of moderate relief so often prevails that the name, Great Plains, for the region as a whole is well deserved.

The plains are by no means a simple unit; they are of diverse structure and of various stages of erosional development.