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Chapter Sixteen Groundwater

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1 Chapter Sixteen Groundwater

2 Types of Glaciers A large body of ice that flows downslope or spreads radially due to gravity. Glaciers cover ~ 10% of land surface today. Types of Glaciers- based on local topography Alpine – confined by surrounding bedrock highlands (small) Cirque- create and occupy semicircular basins on Mountain sides Valley- flow in valleys formally occupied by rivers Ice caps- found on Mountain tops Piedmont- found at foot of mountains Continental Ice Sheets- massive ice that covers much of a continent

3 Climap

4 Relationship between glaciers and latitude

5 Formation of glacial ice from snow

6 Elevation and slop steepness are two factors influencing glacier formation

7 Types of glaciers

8 Anatomy of a Glacier

9 Mechanics of glacial flow

10 Glacial abrasion and quarrying combine to shape a roche moutonnee.

11 Deposition of glacial till

12 Glacial advance and retreat and the deposition of moraines

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14 Geology at a Glance

15 Medial moraines

16 Geology at a glance

17 Effect of the North American icesheets on the Greatlake glaciers

18 The creation and draining of Glacial Lake Missoula

19 Formation of terraces from crustal rebound

20 Terraces rebound – contd.

21 Formation of terraces from robound

22 Features of periglacial environment

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24 Beringia detail

25 Pollen concentration vs depth

26 Coiling pattern vs climate

27 Oxygen isotope composition

28 Climate change during Quaternary

29 Milankovitch’s theory

30 Origin of North Atlantic deepwater

31 Global climatic changes during Cenozoic

32 Effect of the North American ice sheet

33 Human activity contributes to global warming

34 If all the ices were melt tomorrow – What happens??

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