Geologic Time

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Across
  1. 2. middle era
  2. 4. unit of time
  3. 5. youngest era
  4. 8. body of water
  5. 9. oldest era
Down
  1. 1. connects two continents
  2. 3. ancient landmass
  3. 6. oxygen- poor environment
  4. 7. unit of the geologic time