Wind(erosional process)

 Topic 8: Wind process

Name and describe the erosional processes of wind action

Wind erodes in the following ways:

1. Abrasion: rock particles rub against each other and wear away.

2. Deflation: wind blows away loose material leaving a depression.

3. Attrition: sand and rock particles carried by the wind are blown against rock surfaces

Describe and explain the landforms associated with wind erosion

1. Rock pedestals:

• Made of Horizontal layers of rock with varying resistance are exposed to the wind.

• Softer layers will be eroded easily while harder layer will remain.

• Have mushroom shape

• Lower part is eroded more, looks thinner.

Example of rock pedestals are available here: 

https://youtu.be/uH_TbsJc2ds si=EpKTxuYrMamfxOai

2. Deflation hollows/oases

• A deflation hollow is a type of landform found in arid and semi-arid regions.

• It occurs when loose surface materials are scooped out.

• Sometimes, a deflation hollow may reach the water table.

• As the water slowly fills up the hollow, an oasis is formed.

The Qattara Depression of Egypt is an example of a deflation hollow


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