Landforms by Aeolian Processes

Question 1

Deflation Hollow

Answer 1

Strong winds remove loose small sediment in eddies to reveal a basin
Can form a salt pan

Question 2

E.g. of Deflation hollow

Answer 2

Quattara Depression, Egypt

Question 3

Desert Pavement

Answer 3

Deflation occurs as smaller sediment is removed and large particles left behind

Question 4

E.g. of desert pavement

Answer 4

Gibber plains, Australia

Reg De L’Adrar, Mauritania

Question 5

Sief Dune

Answer 5

Parallel knife-edge dune

Forms due to directional winds forming evenly spaced ridges

Question 6

Barchan Dune

Answer 6

Cresent shaped dune
Sediment moves up windward slope by saltation and creep
Falls down leeward side
Whole dune moves downwind

Question 7

E.g. of barchan dune

Answer 7

Sahara

Gobi

Question 8

Ventifact

Answer 8

Wind blows sand
Abrades edges of rocks smoothing them
Have more than one ‘facet’ due to different wind directions

Question 9

E.g of ventifacts

Answer 9

In the White desert, Egypt

Question 10

Yardangs

Answer 10

Streamlined ridges of rocks
Aligned in direction of prevailing wind
Abraded by predominantly wind (but possible for fluvial)

Question 11

E,g of Yardangs

Answer 11

Group near the Tibetsti Mountains, Chad

Question 12

Zeugen

Answer 12

Where less resistant rock lies beneath hard rock
Soft rock eroded leaving hard rock
Can be rock pedestals

Question 13

E.g. of Zeugen

Answer 13

Group in Arabian desert, Saudi Arabia