Question
Write the differences between barkhans and seif dunes.
Answer
| Barkhans | Seif Dunes |
|---|---|
| Crescent-shaped dunes | Linear dunes |
| Formed by the merging of individual dunes | Formed by long rows of dunes |
| Found in areas with moderate to high sand availability and variable wind directions | Found in areas with a constant wind direction |
| Generally smaller in size, with a height of up to 30 meters | Can be several kilometres long and can reach a height of over 200 meters |
| They migrate slowly, and the slip face is usually steeper than the windward side | They migrate faster, and the slip face is usually less steep than the windward side |
| Formed perpendicular to the direction of wind movement | Formed parallel to the direction of wind movement |
