Get premium membership and access questions with answers, video lessons as well as revision papers.
A large block of rock stands on the oncoming glacier. The moving ice plucks off or erodes weak rock fragments from the upper side of the rock. As the ice moves round and over the resistant rock it carries the eroded materials to the leeward side. The leeward side does not experience erosion. Eroded materials are deposited on the leeward side of the rock. With time the moving ice smoothens the side of the oncoming ice while deposited materials increase on the leeward side. The resistant rock is the crag while the materials deposited on the leeward form the tail.
OR
They are formed when there is a resistant block on the course of a glacier. The side of the resistant rock is eroded forming a crag. The opposite side where deposition takes place is called the tail.
maurice.mutuku answered the question on June 8, 2017 at 13:17
- 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)
- Where are tarns found in Kenya?(Solved)
Mention a region in Kenya where tarns are found.
Date posted: June 8, 2017. Answers (1)
- Why is it difficult to undertake a field study on the glaciated features on the top of a mountain?(Solved)
Explain why it is difficult to undertake a field study on the glaciated features on the top of a mountain.
Date posted: June 8, 2017. Answers (1)
- How is a pyramidal peak formed?(Solved)
Describe how a pyramidal peak is formed.
Date posted: June 8, 2017. Answers (1)
- What is the difference between valley glaciers and ice sheets?(Solved)
Differentiate between valley glaciers and ice sheets.
Date posted: June 8, 2017. Answers (1)
- What is a glacier?(Solved)
Describe a glacier.
Date posted: June 8, 2017. Answers (1)
- How is a U-shaped valley formed?(Solved)
Describe how a U-shaped valley is formed.
Date posted: June 8, 2017. Answers (1)
- What is the significance of oceans to human activities?(Solved)
Discuss the significance of oceans to human activities.
Date posted: June 8, 2017. Answers (1)