Chapter 15, Problem 28FQ

### Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

Chapter
Section

### Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

# ■ FIGURE 15.28 A small part of an extensive longitudinal dune area in the Sahara, as captured on a satellite image. The width of this image represents approximately 35 kilometers (21 mi) of terrain.What is the approximate ground length of the sections of dunes seen on this image?

To determine

The approximate ground length of the sections of dunes seen on the given image.

Explanation

Sand dunes are the depositional landforms that formed as a result of wind action. They have a uniform cover of sand-sized particles displaying little surface relief. More commonly, 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.

Longitudinal dunes are long dunes that are oriented parallel to the direction of wind...

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