L7 Glacial Deposition Features

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  • 1. Glacial deposition features
  • 2. Lesson objectives
    • To describe different landforms resulting from transportation and deposition and explain their formation:
    • drumlins
    • Lateral moraine
    • Medial moraine
    • Ground moraine
    • terminal moraine
    • Ref NT page 132 - 134
  • 3. What is this? How would you describe it ? How is it formed ? What has this got to do with glaciation?
  • 4.  
  • 5. Moraines
  • 6. Types of moraine
    • Lateral moraine – material derived from freeze-thaw weathering of valley sides and which is carried at the sides of a glacier.
    • Medial moraine – found in the centre of a glacier and results from two lateral moraines joining together.
    • Ground moraine is material dragged underneath a glacier.
    • Terminal moraine – marks the maximum advance of a glacier. It is the rock material deposited at the snout of a glacier.
    • Recessional moraines – these form behind and parallel to the terminal moraine. They mark stages in the retreat of a glacier when it remained stationary for long enough for a ridge of material to develop.
  • 7.  
  • 8. What is this? How did it get to be like this? How would you describe it ? How is it formed ? Why is the bed rock a different colour than the boulder? What has this got to do with glaciation? What processes have occurred?
  • 9. Erratics
    • Erratics are large b___________ carried by the ice and d__________ in an area of d___________ rock.
  • 10. Drumlins
    • Drumlins are smooth elongated m----- of material formed p-r--l-l to the d-r-c-i-n of ice movement.
    • They are typically about 30 – 40m high and 300 – 400m long
    • They often consist of stones and c--- and are thought to result from the --ad carried by a ------- becoming too heavy and being deposited.
  • 11.
    • Most deposition occurs around the _______end which forms the drumlin’s ______ end. The rest of the _______ that is deposited is then moulded into shape by the moving ice to form the _______ end _________.
    blunt tapered Boulder clay downstream upstream
  • 12. upstream downstream Blunt end Tapered end
  • 13.  
  • 14. Direction of ice flow
  • 15.