1. Glaciers

2. I. Origin of Glaciers A.Definition 1.Originates on land

3. I. Origin of Glaciers A.Definition 1.Originates on land 2.Forms from the accumulation, compaction, and recrystallization of snow

4. I. Origin of Glaciers A.Definition 1.Originates on land 2.Forms from the accumulation, compaction, and recrystallization of snow 3.Survives year-to-year

5. I. Origin of Glaciers A.Definition 1.Originates on land 2.Forms from the accumulation, compaction, and recrystallization of snow 3.Survives year-to-year 4.Moves under its own weight

6. I. Origin of Glaciers B. Elevation required 18,000 ft.sea level 10,000 ft.

7. I. Origin of Glaciers C. Mechanism of Formation

8. I. Origin of Glaciers D. Behavior of Flow

9. 1.Plastic Flow

10. D. Behavior of Flow 2. Basal Sliding (Slip)

11. D. Behavior of Flow 3. Zone of Fracture crevasses

12. D. Behavior of Flow 3. Zone of Fracture

13. II. Types of Glaciers A. Alpine Glaciers

14. II. Types of Glaciers B. Continental Glaciers

15. III. Glacial Movement Zone of accumulation

16. III. Glacial Movement Zone of ablation

17. III. Glacial Movement Accumulation vs. ablation determines movement

18. III. Glacial Movement Accumulation vs. ablation determines movement

19. IV. Glacial Erosion A. Processes for erosion

20. IV. Glacial Erosion Glacial Striations

21. IV. Glacial Erosion Glacial Polish

22. IV. Glacial Erosion 3)Bulldozing –

23. V. Erosional Landforms

26. A)Cirques –

27. A)Cirques……and Tarns

28. V. Erosional Landforms

29. 2)Arete

30. V. Erosional Landforms

31. 3)Horn –

32. V. Erosional Landforms

33. 4)U-shaped valley

34. V. Erosional Landforms

35. 5)Hanging valley

37. V. Erosional Landforms

38. 6)Fjords –

40. VI. Depositional Landforms

41. A)Moraines VI. Depositional Landforms

43. A)Moraines VI. Depositional Landforms Lateral and Medial Moraines

44. VI. Depositional Landforms Lateral Moraine – Lateral Moraine

45. VI. Depositional Landforms D) Medial Moraine – Medial Moraine

47. A)Moraines VI. Depositional Landforms Ground and Terminal Moraines

48. VI. Depositional Landforms Terminal moraine –

49. B)Drumlin –

52. C)Kettles

54. D)Eskers

56. VI. Depositional Landforms E )Outwash plain –

57. VII.Ice Ages Global cooling may produce glaciers

58. The Pleistocene Ice Age Four major glacial advances over past 1.8 million years Area covered? Results?

59. The Pleistocene Ice Age Global sea level drop

60. The Pleistocene Ice Age Land bridges