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Lecture 13

Table of Contents

  1. Tectonics and Surface Relief
  2. Why study surface relief?
  3. Why study surface relief?
  4. Why study surface relief?
  5. Why study surface relief?
  6. Why study surface relief?
  7. Why study surface relief?
  8. Why study surface relief?
  9. Why study surface relief?
  10. Above and Below sea level
  11. 13.1 Why are continents high and oceans low?
  12. 13.1 Why are continents high and oceans low?
  13. 13.1 Why are continents high and oceans low?
  14. 13.1 Why are continents high and oceans low?
  15. 13.1 Why are continents high and oceans low?
  16. 13.1 Why are continents high and oceans low?
  17. 13.1 Why are continents high and oceans low?
  18. 13.1 Why are continents high and oceans low?
  19. 13.2 How do we know ... that mountains have roots?
  20. 13.2 How do we know ... that mountains have roots?
  21. 13.2 How do we know ... that mountains have roots?
  22. 13.2 How do we know ... that mountains have roots?
  23. 13.3 How does isostasy relate to active geologic processes?
  24. 13.3 How does isostasy relate to active geologic processes?
  25. 13.3 How does isostasy relate to active geologic processes?
  26. 13.3 How does isostasy relate to active geologic processes?
  27. 13.3 How does isostasy relate to active geologic processes?
  28. Glacial Isostasy
  29. 13.3 How does isostasy relate to active geologic processes?
  30. 13.3 How does isostasy relate to active geologic processes?
  31. 13.3 How does isostasy relate to active geologic processes?
  32. 13.3 How does isostasy relate to active geologic processes?
  33. 13.4 Why does sea level change?
  34. 13.4 Why does sea level change?
  35. 13.4 Why does sea level change?
  36. 13.4 Why does sea level change?
  37. 13.4 Why does sea level change?
  38. 13.4 Why does sea level change?
  39. 13.5 How and where do mountains form?
  40. 13.5 How and where do mountains form?
  41. 13.5 How and where do mountains form?
  42. 13.5 How and where do mountains form?
  43. 13.5 How and where do mountains form?
  44. 13.5 How and where do mountains form?
  45. 13.5 How and where do mountains form?
  46. 13.6 How does mountain building relate to the growth of continents?
  47. 13.6 How does mountain building relate to the growth of continents?
  48. Non-Subductable Crust
  49. Non-Subductable Crust 2
  50. 13.6 How does mountain building relate to the growth of continents?
  51. 13.6 How does mountain building relate to the growth of continents?
  52. 13.6 How does mountain building relate to the growth of continents?
  53. Provinces of North America
  54. 13.6 How does mountain building relate to the growth of continents?
  55. 13.6 How does mountain building relate to the growth of continents?
  56. 13.6 How does mountain building relate to the growth of continents?
  57. Island Arcs
  58. 13.6 How does mountain building relate to the growth of continents?

Text and Images from Slide

Graph showing sea levels from the past compared to present day with the highest levels during the Mesozoic and middel Plaeozoic

13.4 Why does sea level change?

Fig 13.15

The data indicate that sea level has been over 200 m higher in the past than at the present.

Why is this and how does it occur?

If we consider the oceans as a single container of water there are two basic premises: either change the amount of water in the system or change the volume of the "container."

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