Question

Differentiate between barchans and longitudinal dunes

Answer 1

The dune crest consists of a series of peaks and gaps, and the steep, or slip, face may change sides of the dune according to changes in wind direction. Barchan is crescent-shaped dune. Seif dune is also crescent shaped but it is long type. When wind blows from one place to another it creates sand dunes.

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Answer 2

The difference between barchans and longitudinal dunes mainly lie in their shape and size.

Explanation:

• Barchan, also spelled Barkhan, is indeed a crescent-shaped sand dune formed primarily from one direction by the motion of wind.
• One of the most common dune forms, it occurs around the globe in sandy deserts.
• Whereas, the longitudinal dunes appear to have symmetrical cross sections.
• They typically form in places that lie behind an barrier where there is plenty of sand and the wind is steady and solid.

To Know More

Sand dunes are found in the desert and not in the plains. Why?

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