Streams are plentiful and well-integrated, forming complex branching networks.
The broad, flat uplands characteristic of the "youth" stage disappear. They are replaced by sharp, narrow divides between valleys. mature land pictures
Modern geomorphologists often favor theories like John Hack’s Dynamic Equilibrium , which suggests that landscapes reach a "steady state" where they constantly adjust to energy inputs rather than following a fixed aging cycle. Scientific Resources & Perspectives Streams are plentiful and well-integrated