Geologic time scale

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Across
  1. 5. aging
  2. 7. no specific dates
  3. 10. study of earth
Down
  1. 1. law
  2. 2. evidince
  3. 3. young to old
  4. 4. symbols
  5. 6. rate of decay
  6. 8. specific dates
  7. 9. magma intrusion