Question

Distinguish between Longitudinal and Transverse sand dunes.

Answer 1

• Longitudinal sand dune:

1. Longitudinal dunes are long narrow ridges of sand.
2. They extend in a direction parallel to the prevailing winds.
3. These dunes are called seifs in Sahara.

• Transverse sand dune:

1. Transverse dunes are asymmetrical in shape.
2. They are formed by alternate slow and fast winds.
3. These winds blow from the same direction.