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Understanding Glaciers: Formation, Movement, and Erosion

Learn about the origin, behavior, types, movement, erosion, and landforms created by glaciers, from accumulation to deposition.

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Understanding Glaciers: Formation, Movement, and Erosion

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  1. Glaciers

  2. I. Origin of Glaciers • Definition • Originates on land

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

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

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

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

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

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

  9. D. Behavior of Flow • 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

  24. V. Erosional Landforms

  25. 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

  36. 5) Hanging valley

  37. V. Erosional Landforms

  38. 6) Fjords –

  39. 6) Fjords –

  40. VI. Depositional Landforms

  41. VI. Depositional Landforms A) Moraines

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

  43. VI. Depositional Landforms Lateral Moraine – Lateral Moraine

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

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

  46. VI. Depositional Landforms Terminal moraine –

  47. B) Drumlin –

  48. B) Drumlin –

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