Geologic Time

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Across
  1. 3. The time it takes for half of the specimen to decay.
  2. 7. mesozoic
  3. 8. All fragments are older than the rock that they are included in.
  4. 9. Sections of an eon
  5. 10. cutting across sediments.
Down
  1. 1. an estimate of age.
  2. 2. the oldest layer on bottom
  3. 4. An old organizam
  4. 5. The age in years
  5. 6. a tool used for relative dating