1. Landscapes Shaped by Wind
Chapter 7.3

2. Deflation and Abrasion
 Deflation is the lifting
and removal of loose
particles such as clay
and silt
 Abrasion occurs when
wind blown sand cuts
and polishes exposed
rock surfaces.

3. DESERT PAVEMENT
Created after abrasion removes all of
the finer particles and leaves behind
the larger coarser rock and pebbles.
This pavement remains permanent
unless vehicles, humans, or animals
disturbed the surface.

4. Wind
deposits
Loess and Sand
Dunes

5. Loess
Windblown silt that
blankets a
landscape.
Dust storms have
transported the
material over
thousands of years.

6. Sand Dunes
 Winds commonly
deposit blanket like
layers of sand in
mounds called dunes.

7. TYPES OF SAND DUNES
 Barchan Dunes
 Transverse Dunes
 Barchanoid Dunes
 Longitudinal Dunes
 Parabolic Dunes
 Star Dunes