How is Yardang formed?

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Tags

1. #abrasive
2. #areas
3. #unique
4. #environments
5. #formation
6. #lying
7. #where
8. #hills
9. #directional
10. #prevailing
11. #which
12. #sediment
13. #yardang
14. #winds
15. #ridges
16. #separate
17. #strong
18. #water
19. #shape
20. #parallel
21. #erode
22. #carry
23. #yardangs
24. #gradually
25. #scarce