Geologic Time Scale Crossword

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Across
  1. 2. Assigning actual dates to rocks.
  2. 6. States the in an undisturbed sequence of rocks the oldest are at the bottom
  3. 8. Greek for early life
  4. 10. The era where dinosaurs first appeared
Down
  1. 1. the first third of the Phanerozoic
  2. 3. States that any rock or fragments that is included inside another rock mens that the fragments are older than the bigger rock.
  3. 4. states that any feature that cuts across a feature of rocks is younger than what they cut through.
  4. 5. The remains of animals that lived long ago.
  5. 7. How long it takes for a material to return to half the radiation of it usually is.
  6. 9. The comparison of younger rocks to older rocks.