Geologic time scale

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Across
  1. 5. If you do not know the age of a rock layer you can tell its relative age
  2. 8. the rate of decay
  3. 9. the entire history of earth
  4. 10. any geological fault is younger than layers it cuts through
Down
  1. 1. the study of rocks and rock layers
  2. 2. Dating that gives an actual years
  3. 3. the assumption that lower layered rocks are older than higher layers
  4. 4. the dead remains of animals
  5. 6. useful fossils for dating and correlation
  6. 7. people who study rocks and rock layers