Geologic Time scale

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Across
  1. 4. numeric age of a layer of rocks or fossils
  2. 7. calender of all earths events
  3. 8. an expert or student of geology
  4. 9. states youngest layer is the top one and the oldest is bottom
  5. 10. the remains of prehistoric organisms that are preserved
Down
  1. 1. rocks that started out as a different rock but have changed forms
  2. 2. The age of a rock layer compared to others
  3. 3. rate of decay
  4. 5. type of rocks formed together
  5. 6. useful for dating and correlating the strata in which is found