(i) Basal slip: Weight of ice causes layer in contact with the rocks beneath to melt slightly.The film of water becomes a lubricant. It thus causes the ice to slip downhill.
(ii) Plastic flowage: Great pressure is exerted within the ice on the layers at the bottom. The pressure causes some ice to melt. The particles change their positions slightly and move downhill.
(iii) Extrusion flow: Ice on the lowlands accumulates to great thickness. The resultant weight compresses the layers of ice beneath, forcing them to spread out, thus moving.
(iv) Internal shearing: This movement is similar to rock faulting . It involves differential sliding of ice along planes within the ice. This is caused by tremendous down slope pressure. The ice therefore moves in layers down slope.
maurice.mutuku answered the question on June 8, 2017 at 14:17
- Which mountains in East Africa are ice capped?(Solved)
Name mountains in East Africa which are ice capped.
Date posted: June 8, 2017. Answers (1)
- What are the types of glacial moraines?(Solved)
Give the types of glacial moraines.
Date posted: June 8, 2017. Answers (1)
- What is the difference between an ice sheet and an iceberg?(Solved)
Distinguish between an ice sheet and an iceberg.
Date posted: June 8, 2017. Answers (1)
- How is terminal moraine formed?(Solved)
Describe how terminal moraine is formed.
Date posted: June 8, 2017. Answers (1)
- What are the conditions leading to glacial deposition?(Solved)
Discuss the conditions that lead to glacial deposition.
Date posted: June 8, 2017. Answers (1)
- What is plucking? (Solved)
Describe plucking as a process in glacial erosion.
Date posted: June 8, 2017. Answers (1)
- How does a crag and tail form?(Solved)
Describe how a craig and tail is formed.
Date posted: June 8, 2017. Answers (1)
- What are the characteristics of a pyramidal peak?(Solved)
Describe the distinctive characteristics of a pyramidal peak.
Date posted: June 8, 2017. Answers (1)
- What are the distinctive characteristics of a corrie?(Solved)
Describe the distinctive characteristics of a corrie.
Date posted: June 8, 2017. Answers (1)
- What are the characteristics of a fiord(fjord)?(Solved)
Give the characteristics of a fiord(fjord).
Date posted: June 8, 2017. Answers (1)
- How does the width of a glacier channel influence the movement of a valley glacier?(Solved)
Explain how the width of a glacier channel influences the movement of a valley glacier.
Date posted: June 8, 2017. Answers (1)
- How does temperature influence movement of a valley glacier?(Solved)
Explain how temperature influences movement of a valley glacier.
Date posted: June 8, 2017. Answers (1)
- Apart from a valley glacier, which other ice masses are found on mountains in East Africa?(Solved)
Apart from a valley glacier, name other ice masses found on mountains in East Africa.
Date posted: June 8, 2017. Answers (1)
- How is ice formed on a high mountain?(Solved)
Describe how ice is formed on a high mountain.
Date posted: June 8, 2017. Answers (1)
- What are the positive effects of glaciations in lowland areas?(Solved)
Discuss the positive effects of glaciations in lowland areas.
Date posted: June 8, 2017. Answers (1)
- How is an arete formed?(Solved)
Describe how an arete is formed.
Date posted: June 8, 2017. Answers (1)
- What are the factors influencing the movement of ice from the place where it has accumulated?(Solved)
Discuss factors that influence the movement of ice from the place where it has accumulated.
Date posted: June 8, 2017. Answers (1)
- Why aren't ice sheets available in Kenya?(Solved)
Give reasons why there are no ice sheets in Kenya.
Date posted: June 8, 2017. Answers (1)
- What is an ice sheet?(Solved)
Describe an ice sheet.
Date posted: June 8, 2017. Answers (1)
- How is a tarn formed?(Solved)
Describe how a tarn is formed.
Date posted: June 8, 2017. Answers (1)