1. How does wind cause erosion?
Erosion by Wind
How does wind cause erosion?
What features result from deposition by wind?

2. Wind causes erosion by deflation and abrasion.
Wind is the weakest agent in shaping the land, but…

3. can be powerful in shaping the land in
areas where there are few plants to hold the
soil in place.

4. Where is wind erosion found?
In areas where there are few plants to hold the soil in place, like deserts.

5. Deflation Wind blows across the land and removes surface materials
Wind easily picks up the smallest particles of sediment.
Heavier particles only bounce around for a short time.
This does not usually have a huge effect on the land.

6. DEFLATION
Examples:

7. Deflation can lead to the formation of desert pavement.

8. Abrasion Can polish rock Causes little erosion
Mostly a form of mechanical weathering

9. Abrasion
Examples
Examples:

10. Deposition by wind forms
sand dunes and loess deposits

11. Sand Dune Forms when wind carries sediment from one place to another
Wind carries sediment until it slows down or hits an obstacle
Wind shifts sand from one side of the dune to the other slowly

12. Sand Dunes
Examples

13. Loess (Less) Deposits
Tiny particles of sediments, deposited in layers far from its source

14. Loess (Less) Deposits Thick, yellowish deposit of wind blown dust
Is found mostly in northern China
Originally came from the Goby Desert

15. Loess (Less) Deposits
Provide good soil for grain-growing regions because,
Very fertile

16. Loess (Less) Deposits
Examples

17. Loess (Less) Deposits