1. Wind Landforms Where are they commonly found?
deserts & semi-arid environments
coastal areas

2. Wind Landforms wind erosion deflation
particles lifted in air or bounce along ground
ex. desert pavement
ex. depressions in sand dunes

3. Wind Landforms wind erosion, cont. wind abrasion
impact by wind-blown particles
ex. natural arches

4. Wind Transportation larger-sized particles smaller-sized particles
tend to bounce along ground
smaller-sized particles
tend to be air-borne

5. Wind Transportation dust storm strong winds
arid locations, severe drought, or fallow fields
The Dust Bowl
1930s

6. Wind as a Source of Energy
requirements
moderate to strong speeds
consistent

7. Wind Deposition loess dunes large deposits of wind-blown silt
ex. Palouse Hills (WA, ID); Tunica Hills (LA, MS)
dunes
composed of sand

8. Types of Sand Dunes barchan crescent-shaped; points downwind
arid areas with limited sand supply

9. Types of Sand Dunes, cont.
Transverse (barchanoid)
like barchan, but quite numerous
wave-like patterns
ample sand supply

10. Types of Sand Dunes, cont.
longitudinal
ridges & furrows run parallel with prevailing winds

11. Types of Sand Dunes, cont.
Erosional Example
parabolic
crescent-shaped; points upwind
blowout due to deflation

12. Types of Sand Dunes, cont.
foredunes
irregularly shaped hills & depressions
complex of erosional & depositional features
usually coastal

13. Finito!