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Slide 2

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Desert pavements
· Deflation (wind picks up and carries material) lowers
land surface by removing sand particles
· Leaves larger rocks behind. The larger rocks then
protect the sand below them from further deflation
and erosion…read more

Slide 3

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Yardangs
· Stream lined wind erodes ridges 10m high and 100m
long
· Aligned in direction of prevailing winds
· Formed by wind erosion due to prevailing winds
alignment and abrasion from suspended particles at
base…read more

Slide 4

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Ventifacts
· Pebbles that have been eroded by blown sediment
(deflation)
· Formed in direction of prevailing winds
· Windward side is steep and leeward side is smooth…read more

Slide 5

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Sand dunes
· Accumulations of sand that form a mound
· Accumulates because of decreasing wind speed due to increased
surface roughness- wind no longer has momentum to carry
sediment and so it's deposited
· Sand is then trapped as there is no rocky surface for it to
saltate off- sand accumulates
· When too much sand builds up on the peak a avalanche occurs on
the leeward side where sand falls down a slip face. This occurs
when the angle reaches 35 degrees…read more

Slide 6

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Ripples
· Small landforms
· Consist of crests and troughs at right angles to the prevailing
winds
· As wind speed increases wave lengths and heights increase
· Formed by Saltation (sediment bounced by wind along the
surface) and creep (sediment rolled along surface)
· Sand is moved from crest to crest as its eroded from the
windward side and deposited on the leeward side…read more

Slide 7

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