Geologic Time

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Across
  1. 3. and assumption of a rocks age
  2. 6. shows the events of earth's history
  3. 8. give the exact year of a rocks age
  4. 10. sequence of sedimentary rock layers
Down
  1. 1. product decay turn into daughter products
  2. 2. radioactive decay of in isotopes
  3. 4. subdivision of geologic time
  4. 5. useful for dating strata that is found
  5. 7. rocks found inside other rocks are older than the other two
  6. 9. long period of time