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Lecture 8 Geology 110

Table of Contents

  1. Earth Materials as Time Keepers
  2. Why study the ages of rocks?
  3. Why study the ages of rocks?
  4. Why study the ages of rocks?
  5. Why study the ages of rocks?
  6. Why study the ages of rocks?
  7. Why study the ages of rocks?
  8. Why study the ages of rocks?
  9. Why study the ages of rocks?
  10. Why study the ages of rocks?
  11. Why study the ages of rocks?
  12. Why study the ages of rocks?
  13. Why study the ages of rocks?
  14. 7.1 How do you determine the order of events?
  15. 7.1 How do you determine the order of events?
  16. 7.2 How are geologic events placed in relative order?
  17. 7.2 How are geologic events placed in relative order?
  18. 7.2 How are geologic events placed in relative order?
  19. 7.2 How are geologic events placed in relative order?
  20. 7.2 How are geologic events placed in relative order?
  21. 7.2 How are geologic events placed in relative order?
  22. 7.3 How do geologists determine the relative ages of rocks in widely separated places?
  23. 7.3 How do geologists determine the relative ages of rocks in widely separated places?
  24. 7.3 How do geologists determine the relative ages of rocks in widely separated places?
  25. 7.3 How do geologists determine the relative ages of rocks in widely separated places?
  26. 7.3 How do geologists determine the relative ages of rocks in widely separated places?
  27. 7.3 How do geologists determine the relative ages of rocks in widely separated places?
  28. 7.4 How was the geologic time scale constructed?
  29. 7.4 How was the geologic time scale constructed?
  30. The Geologic Time Scale
  31. 7.4 How was the geologic time scale constructed?
  32. 7.4 How was the geologic time scale constructed?
  33. 7.5 How do you recognize gaps in the rock record?
  34. 7.5 How do you recognize gaps in the rock record?
  35. 7.5 How do you recognize gaps in the rock record?
  36. 7.5 How do you recognize gaps in the rock record?
  37. 7.6 How have scientists determined the age of Earth?
  38. 7.6 How have scientists determined the age of Earth?
  39. 7.6 How have scientists determined the age of Earth?
  40. 7.6 How have scientists determined the age of Earth?
  41. 7.6 How have scientists determined the age of Earth?
  42. 7.6 How have scientists determined the age of Earth?
  43. 7.6 How have scientists determined the age of Earth?
  44. 7.7 How is the absolute age of a rock determined?
  45. 7.7 How is the absolute age of a rock determined?
  46. 7.7 How is the absolute age of a rock determined?
  47. Validating the method
  48. Validating the method
  49. Applying the method
  50. 7.7 How is the absolute age of a rock determined?
  51. 7.7 How is the absolute age of a rock determined?
  52. Absolute and Relative Age Dating
  53. Combining Absolute and Relative Age Dating
  54. Age of Earth
  55. 7.7 How is the absolute age of a rock determined?
  56. 7.8 How do we know ... how to determine half-lives and decay rates?
  57. 7.8 How do we know ... how to determine half-lives and decay rates?
  58. 7.8 How do we know ... how to determine half-lives and decay rates?
  59. 7.9 How do you reconstruct geologic history with rocks?
  60. 7.9 How do you reconstruct geologic history with rocks?
  61. Reconstructing Geologic History
  62. Geologic History cross section
  63. 7.9 How do you reconstruct geologic history with rocks?

Text and Images from Slide

7.3 How do geologists determine the relative ages of rocks in widely separated places?

Cross section showing how to match up rocks found in different places by looking closely at the layers and the organisms found in the rocks of various layers.

Fig 7.8

Correlation is the process of matching up rocks found in different places.

How William Smith correlated rock exposures using fossils.

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