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Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

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BuyFindarrow_forward

Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

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FIGURE 12.3 The landscape of most high mountain regions has been created by three distinct phases of landforming processes: stream cutting and valley formation during tectonic uplift; glacial enlargement and intense freeze–thaw weathering of former stream valleys; and postglacial stream cutting, weathering, and mass wasting.

How does the cross-sectional profile of the valley change at each phase?

To determine

The ways in which the cross-sectional profile of the valley change at each phase.

Explanation

The difference in the elevation of the Earth’s surface and the shape of individual landforms implies the opposing tendencies of endogenic and exogenic processes. When the endogenic processes cease or operate at a slow rate compared to exogenic processes on a landscape then the relief that is achieved through the tectonic and volcanic processes will decrease over time. The rate of exogenic processes are influenced by the factors such as the resistance of rock to weathering and erosion, the amount of relief, and the climate.

Generally, a single geomorphic agent is not working alone in the development of a landform. Instead, the processes such as weathering, mass wasting and various geomorphic agents are working together to modify the landscape and the evidence that supports the role of multiple processes that can be identified from a landscape.

Three different phases of land forming processes are involved in the formation of landscape of most high mountain regions...

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