WAEC Geography 1999 Question 21

Question 21

Weathering, Erosion and Mass Movement

In which of the following regions would exfoliation commonly occur?

  1. A.Regions with high temperatures and large amount of rainfall
  2. B.Semi-arid regions with large diurnal range of temperature
  3. C.Regions with large amounts of limestone and chalk
  4. D.Regions with luxuriant vegetation cover
Show the answer and explanation

Answer: B (Semi-arid regions with large diurnal range of temperature)

Explanation

Daily heating and cooling of bare rock in dry areas makes outer layers expand, contract and peel off.