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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 15.25 The rolling, grazing lands of the Sand Hills in central Nebraska were once a major region of active sand dunes.

Why are these dunes no longer active?

To determine

The reason why the dunes in the give figure are no longer active.

Explanation

Sand dunes are the depositional landforms that are formed as a result of wind action. They have a uniform cover of sand sized particles displaying little surface relief. More commonly, the deposits of sand due to wind action are accumulated in the shape of hills, mounds, or ridges. The topography of dune is highly variable. The factors that control the formation of dunes include the amount of sand availability, the strength and direction of sand-transporting winds, and the vegetation cover...

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