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What is a barkhan dune?
Quick Answer
A barkhan dune is a crescent-shaped sand dune formed by steady winds and limited sand supply.
The Full Story
Barkhan dunes, also spelled barchan, have horns that point downwind and a steep slip face on the lee side. They form where wind blows mostly from one direction and sand is present in moderate amounts rather than in huge quantities. These dunes migrate over time as wind pushes sand up the gentle side and it avalanches down the steep side. Their shape makes them one of the most recognizable dune forms in deserts around the world.
Key Facts
1.Barkhan dunes are crescent-shaped
2.Their horns point downwind
3.They move as wind pushes sand over the dune crest
YouTube Angle
Suggested video title for this topic:
"The crescent dune that walks across the desert"
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