09 24-2013-relative age

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09 24-2013-relative age

  1. 1. How do we find the relative age of rocks and fossils? Page 30
  2. 2. Remember when we did this? Relative Age
  3. 3. How did we arrange ourselves? Relative Age
  4. 4. Relative Age: comparison of ages – is it younger or older than the rocks/fossil layers around it oSuperposition – older rock is below younger rock oIndex Fossils – fossils of organisms that lived for a relatively short period of time Relative vs Absolute Age
  5. 5. Absolute age: how long since the rock or fossil was formed oFound using radiometric dating Relative vs Absolute Age
  6. 6. SuperPosition
  7. 7. You Try! Retrieved from here
  8. 8. You Try Retrieved from here
  9. 9. Geologic Column From Holt Science and Technology Georgia Earth Science
  10. 10. 1. How many layers are there in your geologic column? 2. Which layer is oldest? Which layer is youngest? How do you know? 3. What fossil is the oldest? 4. What fossils can be considered index fossils? Why? Reflection on Page 31

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