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Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
Glaciers
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Glaciers

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Slides on Glaciers, made by a colleague for open sharing. Formation, types of Glaciers, effects and examples of glaciated landscape

Slides on Glaciers, made by a colleague for open sharing. Formation, types of Glaciers, effects and examples of glaciated landscape

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  • 1. 5th Year Geography
  • 2. LC Question (2011 HL)  Name one landform on the Ordnance Survey map that was formed by fluvial or glacial or coastal processes and give a six figure grid reference for its location.  Describe and explain with the aid of diagram(s) the processes involved in the formation of this landform. Marking Scheme  Named landform 2 marks  Six figure grid reference 2 marks  Process named 2 marks  Labelled diagram 4 marks graded  Explanation 10 x SRPs  Give credit for extra labelling in diagram(s) from explanation  Feature or process can be starting point  Max 2 SRPs if description only of landform.
  • 3. Glaciation http://www.youtube.com/watch?v=AG3luuhc-5Y&feature=related http://www.youtube.com/watch?v=XOGbOOaPHsw&NR=1
  • 4. Glaciation Glacials (col;d)and Interglacials
  • 5. Glacial Movement  Basal flow – weight of ice causes layer closest to ground to melt – same process used by ice skaters – meltwater acts as a lubricant
  • 6. Plastic Flow & Rotational Slip  Plastic flow – Ice melts around a specific object (like a large boulder) and the Glacier flows around it  Rotational slip – ice “rotates” around a central point – like a child on a swing. Can also be seen in mass movements (e.g. Landslides)
  • 7. Glacier types  Cirque or Corrie Glacier – a build up of ice high up in a hollow (corrie) in the mountains.  Valley Glacier – when the ice build up in the corrie is too great, the ice spills out and flows downhill as a valley glacier  Piedmont Glacier – when two or more Valley Glaciers meet  P138  http://www.gearthhacks.com/streetview/file.php?fileid=9065
  • 8. Glacial Processes Erosion Transportation Deposition
  • 9. Glacial Erosion Page 140  Plucking Animation: http://www.homepage.montana.edu/~geol445/hyperglac/eroproc1/animated~plucking.gif  Abrasion: Polishing and Striations (striae)
  • 10. Glacial Transport  Moraines Page 140
  • 11. Glacial Deposition Page 141
  • 12. Glacial Landforms
  • 13. Cirques (Corries) and Tarns P.142 Upper and Lower Lough Bray, Co. Wicklow Devil’s Punchbowl, Co. Kerry
  • 14. Arêtes & Pyramidal Peaks P.142  The Matterhorn, Switzerland  Arête: Between Upper and Lower Lough Bray, Co. Wicklow
  • 15. Glaciated Valleys (U-shaped valley), Ribbon Lakes P.144  Glendalough, Co. Wicklow.  Ribbon Lakes: Glencar, Co. Sligo.
  • 16. Truncated Spurs  Glencree, Co. Wicklow
  • 17. Hanging Valleys P.145  Glendalough, Co. Wicklow.
  • 18. Fiords P.145  Killary Harbour, County Mayo/Galway
  • 19. Geirangerfjord, Norway Steep Valley Sides Deep base – Grirangerfjord is more than 600 metres deep – 5 dublin spires could fit into it
  • 20. Summarising…. Features of Glacial Erosion Cirque/Corrie Arête Pyramidal Peak U-shaped Valley Ribbon Lake Truncated Spurs Hanging Valleys Fiords
  • 21. Glacial Deposition Page 141
  • 22. Glacial Deposits and Fluvioglacial Deposits First let’s do the Glacial Deposits  Boulder Clay Page 146  Moraine Page 147  Drumlin Page 148  Erratic Page 149
  • 23. Fluvioglacial Deposits  Outwash Plains, The Curragh  Eskers Esker Riada, Clonmacnoise, Co. Offaly
  • 24. The glaciation of Ireland P.151 2 of Europe’s 4 Major Ice Ages Reached Ireland  175,000 – 100,000 Years ago: Munsterian Ice Age  70,000 – 10,000 Years ago: Midlandian Ice Age
  • 25. Glaciated Ireland  The ice sheets that spread over Ireland had the effect of “freezing up” the seawater – as a result water levels dropped.  This resulted in Ireland, Britain and Europe joined together as one large landmass  When the ice sheets melted two things happened  The Sea level rose  The land rose (as it was not being “pushed down” by ice any more)  This resulted in a unique landscape
  • 26. Glaciated Ireland – sea levels
  • 27. Midlandian Glaciation from Space

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