Geological Time Scale

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Across
  1. 3. First eon
  2. 4. Age of the dinosaurs
  3. 6. Order of layers show age
  4. 9. Estimating age based on the law of superposition
  5. 10. Current eon
Down
  1. 1. Used on very old fossils
  2. 2. Used on younger fossils
  3. 5. Cuts through older layers
  4. 7. When the older is inside the newer
  5. 8. rate of decay