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: The sharp ridges between river basins are replaced by gentle, rounded hills.
: These landscapes are often closely linked to major ore deposits. Understanding the historical drainage systems of a matureland helps geologists locate "supergene" enrichment zones—areas where water once moved minerals through the soil to create concentrated deposits of copper and gold. Characteristics of a Matureland
: Eventually, the hills disappear almost entirely, leaving a low-relief plain called a peneplain . Case Study: The Matureland of Northern Chile matureland
: Research published in the Geological Society of America Bulletin suggests that these surfaces are remnants of late Cenozoic geomorphology. They were formed through a combination of "aggradational" (building up of sediment) and "degradational" (eroding away) processes over at least 19 million years.
: The landscape has reached a temporary equilibrium where the rate of erosion and the strength of the rock are in balance. Conclusion : The sharp ridges between river basins are
: The extreme aridity of the Atacama Desert has essentially "frozen" these maturelands in time. Because there is so little rainfall to cause further erosion, the ancient rolling hills remain visible today, providing a rare "mosaic" of different geological ages.
To understand a matureland, one must look at the "Geographical Cycle" proposed by Davis, which categorizes landscape evolution into three primary stages: Characteristics of a Matureland : Eventually, the hills
A matureland is distinct from other landforms due to several defining features:
: Rivers no longer cut straight down; they begin to meander, creating wide floodplains.
One of the most scientifically significant examples is the . Geologists have used this specific landscape to understand the timing of the uplift of the Andes .
