Geological Time Crossword

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Across
  1. 3. Represents a major interruption of deposition and a signigicant time gap between formation of successive layers of rock.
  2. 4. Absolute time is measured by.
  3. 7. isotopes Parent isotopes decays in to.
  4. 8. Are presurved animals and plants.
  5. 9. Comes before Daughter Isotops.
Down
  1. 1. Rocks have to be made before this can happen.
  2. 2. life The rate at which isotopes decompose.
  3. 5. Layers of sedimentary rock on either side of the unconformity are parallel.
  4. 6. The smallest time in Geological Time.
  5. 10. One of the Major times in the Geologic time scale.