Geologic Time

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Across
  1. 5. Lower, undisturbed rocks, will be older than rocks on the top.
  2. 7. A chart relating to the changes of rocks.
  3. 8. Two rocks that join each other.
  4. 9. A rock that cuts across another must be older.
  5. 10. The remains of a now dead organism.
Down
  1. 1. An area where rock has eroded away, creating a gap in its history.
  2. 2. The exact time a rock has existed.
  3. 3. Rock processes that occur today are similar to those in the past.
  4. 4. Using other rocks to fill in anothers history.
  5. 6. A devastating event occurring over a short amount of time.