Dune fields are large features of eolian or arid environments. They are associated with hot climate deserts such as the Sahara. Dune fields are not, however, exclusively restricted to these types of environments. Many dune fields are found in temperate climates where the processes of aridity in an arid climate combine to form dunes, but at a much slower rate than hot, arid climates.

The basic processes that contribute to dune formation are straightforward. It is the range of minute geological processes that generates controversy in dune research. When a geographical region experiences prolonged drought accompanied by high evaporation rates, the soils lose vegetation. Plant roots secure loose particles that make up soils. When wind sweeps across the barren soil, the first stages of dune and desert formation occur.

Wind is an excellent agent for separating grains sizes and weights in soils. Although not as effective...