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Desert Landforms
YOU MUST… Describe the characteristics
of the fluvial and aeolian landforms listed
YOU SHOULD… Explain th...
What you need to know
Landforms resulting from wind
action:
• Yardangs
• Zeugen
• Sand dunes
Landforms resulting from wate...
What you need to know
• Yardangs
• Zeugen
• Sand dunes
• Pediments
• Inselbergs
• Mesas and buttes
• Salt lakes
• Alluvial...
Wind Action (aeolian landforms)
• Yardangs
• Zeugen
• Sand dunes
Yardangs
• Form where there
are vertical layers of
hard and soft rock
aligned to the
direction of the
prevailing wind.
• P...
Yardangs on Mars
Zeugen
• Form where there are
horizontal layers of
hard and soft rock.
• Practise drawing this
sketch and use the
informat...
Up to ____m per year
Steeper, slightly ____________
______________ slope
The bottom of the slope contains
________ grained...
Water Action (fluvial landforms)
• Pediments
• Inselbergs
• Mesas and buttes
• Salt lakes
• Alluvial fans
• Wadis
• Badlan...
Pediments
• Gently sloping
surface (between
2o and 7o) formed
at the foot of a cliff.
• Cut in solid rock or
covered with
...
Mesas and Buttes
• Isolated highlands left behind after the surrounding rock has been eroded away by water
• Usually forme...
Butte
Resistant rock 
Softer rock covered
with scree
Mesa
Walt
hiding his
money
Scree slope
Inselbergs
• Similar to Mesas and Buttes except
more rounded and smooth sided
• Usually formed in unbedded
(uniform, witho...
Uluru, Australia, 350m high
Wadis
• A desert valley
that contains
an ephemeral
river
• Can vary
greatly in size
and shape
• May be relict
landforms
• ...
Wadi Rum, Jordan
Alien planet in movie Prometheus
Good. Only suggestion I might make is to make it narrower to
allow you to show desert plateau on either side. Also label
d...
Alluvial Fans
• Material is deposited in a
fan shape as a river leaves
a highland area
• Sediment is sorted in size
from l...
Badlands
• Arid or semi-arid
terrain with soft
sedimentary rock
that has been
deeply eroded by
rapid overland flow.
• Cont...
Desert Landforms Challenge!
• Get into pairs
• Around the room are places to draw each landform
• You will have 1 minute o...
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
Desert landforms revision
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Desert landforms revision

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Revision on the key features and formation of a range of desert landforms. Designed to meet the requirements of the AQA A-level geography specification, hot deserts topic in GEOG1.

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Desert landforms revision

  1. 1. Desert Landforms YOU MUST… Describe the characteristics of the fluvial and aeolian landforms listed YOU SHOULD… Explain the physical processes that created these landforms YOU COULD… Support your knowledge of the above with specific facts and figures
  2. 2. What you need to know Landforms resulting from wind action: • Yardangs • Zeugen • Sand dunes Landforms resulting from water action: Pediments Inselbergs Mesas and buttes Salt lakes Alluvial fans Wadis Badlands NB: Desert pavements, ventifacts, deflation hollows and rock pedestals are NOT mentioned by name in the spec, these can be used as supporting examples in essays but you cannot be asked a direct question on them.
  3. 3. What you need to know • Yardangs • Zeugen • Sand dunes • Pediments • Inselbergs • Mesas and buttes • Salt lakes • Alluvial fans • Wadis • Badlands Just like with River landforms you must be able to: - Draw a sketch of each one - Describe what is looks like, giving specific facts and figures if you can - Explain how it formed
  4. 4. Wind Action (aeolian landforms) • Yardangs • Zeugen • Sand dunes
  5. 5. Yardangs • Form where there are vertical layers of hard and soft rock aligned to the direction of the prevailing wind. • Practise drawing this sketch and use the information in your booklet to explain how they form. • Also see the diagrams on p. 138 of your textbook.
  6. 6. Yardangs on Mars
  7. 7. Zeugen • Form where there are horizontal layers of hard and soft rock. • Practise drawing this sketch and use the information in your booklet to explain how they form. • Also see the diagrams on p. 138 of your textbook.
  8. 8. Up to ____m per year Steeper, slightly ____________ ______________ slope The bottom of the slope contains ________ grained sand so it is more gentle. It may have ________ _____________ Sand is transported up the __________ windward slope by the processes of ___________________ and __________ _________ Prevailing wind _________________ Up to _______ m high The _________ of the dune face downwind. They contain less sand so they are easier to move Sand continually ____________ over the sharp crest The top of the leeward slope is steep because it’s made of ___________ grained sand and it’s kept steep by wind ___________ direction concave 30 horns 30 leeward eddies fine coarse saltation surface creep avalanches gentle sand ripples Sand dunes • Make sure you know about barchans dunes in detail • Practise sketching and labelling this diagram • You could mention one or two others e.g. star dunes • Also see the diagrams on p. 139 of your textbook.
  9. 9. Water Action (fluvial landforms) • Pediments • Inselbergs • Mesas and buttes • Salt lakes • Alluvial fans • Wadis • Badlands
  10. 10. Pediments • Gently sloping surface (between 2o and 7o) formed at the foot of a cliff. • Cut in solid rock or covered with graded debris (finer material furthest away from cliff).
  11. 11. Mesas and Buttes • Isolated highlands left behind after the surrounding rock has been eroded away by water • Usually formed in flat-bedded (rock with horizontal layers) sedimentary rock or lava flows. Valley cut by river
  12. 12. Butte Resistant rock  Softer rock covered with scree
  13. 13. Mesa Walt hiding his money Scree slope
  14. 14. Inselbergs • Similar to Mesas and Buttes except more rounded and smooth sided • Usually formed in unbedded (uniform, without layers) igneous or metamorphic rocks • Can vary in size and shape, e.g. Murphy’s Haystacks in Australia, which are around 8m high…
  15. 15. Uluru, Australia, 350m high
  16. 16. Wadis • A desert valley that contains an ephemeral river • Can vary greatly in size and shape • May be relict landforms • Usually have a lot of debris and thick sediment from flash floods
  17. 17. Wadi Rum, Jordan
  18. 18. Alien planet in movie Prometheus
  19. 19. Good. Only suggestion I might make is to make it narrower to allow you to show desert plateau on either side. Also label deposited debris/braiding on channel bed.
  20. 20. Alluvial Fans • Material is deposited in a fan shape as a river leaves a highland area • Sediment is sorted in size from largest to smallest • Several fans may coalesce to form a bajada
  21. 21. Badlands • Arid or semi-arid terrain with soft sedimentary rock that has been deeply eroded by rapid overland flow. • Contain landforms such as wadis and alluvial fans • Thought to erode about 1 inch per year
  22. 22. Desert Landforms Challenge! • Get into pairs • Around the room are places to draw each landform • You will have 1 minute on each landform • The first person must draw it, everyone else can add labels/annotations or extra parts to the sketch

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