The broad, flat uplands characteristic of the "youth" stage disappear. They are replaced by sharp, narrow divides between valleys.
Valleys remain V-shaped but deepen significantly. Major "trunk" streams begin to widen their floors, creating narrow floodplains where they may start to meander . mature land pictures
Early-stage features like waterfalls, rapids, and upland marshes typically vanish as the riverbed reaches a more stable, graded profile. Theoretical Context: The Geomorphic Cycle The broad, flat uplands characteristic of the "youth"
Davis famously stated that any landform is a function of these three variables. mature land pictures
The concept was pioneered by (1850–1934), who proposed that landforms evolve in a predictable, "orderly" sequence following a rapid tectonic uplift.