EQ3 SAM questions

Question 1

Explain the formation of 2 ice contact depositional features (6 marks)

Answer 1

1. Terminal moraines are formed when advancing ice carries moraine forward and deposits it at the point of max advance when it retreats. The up-valley side is generally steeper than the other side as the advancing ice rose over the debris.
2. Drumlins- the advance of a glacier over till molds the till into egg shaped hills known as drumlins

Question 2

Explain the differences in characteristics of deposits at location A and B (6 marks) 2021

Answer 2

Glacial and fluvioglacial deposits have different characteristics
(stratification, sorting, imbrication and grading).
* The resource shows the sediment characteristics of a terminal moraine (A) and that of an outwash plain (B).
* The terminal moraine material (A) appears to have a far greater range of sediment size such as the very large boulder as well as what appears to be rock flour.
* In contrast the fluvioglacial deposit (B) appears to have a more uniform size.
* The morainic material appears to be far more angular than the more
rounded fluvioglacial deposit

Question 3

Explain how upland glacial landforms can be used to reconstruct form ice mass extent and movement (2019)
PARA 1

Answer 3

A corrie is an enlarged deep hollow on a mountainside
In Britain as elsewhere in the Northern Hemisphere corries are nearly always orientated between the northwest -> north east to the southeast. Corrie orientation indicates the direction of ice movement. E.G Red Tarn corrie
As the glacier moves, it turns larger till rock to point the direction of ice movement.

Question 4

Explain how upland glacial landforms can be used to reconstruct form ice mass extent and movement (2019)
PARA 2

Answer 4

Drumlins can be useful as their long axis is aligned by ice flow. The elongation ratio of drumlins can be calculated to indicate the rate of ice movement- the greater elongation the faster the movement- E.G swarm of drumlins near Glasgow