: Vertical erosion (downcutting) slows down while lateral (sideways) erosion becomes dominant, causing narrow V-shaped valleys to broaden into U-shaped ones.
: The difference in height between the highest peaks (water divides) and the valley bottoms is at its greatest. mature land
"Mature land" typically refers to the , characterized by maximum topographical diversity and the development of broad river valleys. : Vertical erosion (downcutting) slows down while lateral
The concept is most famously defined in the , where landforms evolve from "youth" to "maturity" and finally "old age". Key Characteristics of Mature Land mature land
: A well-developed network of tributary streams efficiently drains the entire land mass. Contextual Variations