Geological Time Scale

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Across
  1. 3. Pre historic organism preserved underground
  2. 4. Remaining isotope decays daughter product
  3. 5. Time period where Pangea split
  4. 6. Oldest layer on the bottom, youngest on top
  5. 9. Time period we live in
  6. 10. Exact age something lived
Down
  1. 1. Section of time something could have lived
  2. 2. When other thing are inside fossils
  3. 7. Fossils that help determine time
  4. 8. When a layer cuts through other rock layers