Plate tectonics

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Across
  1. 3. volcano
  2. 5. kilometers
  3. 6. puzzle
  4. 7. drives
  5. 10. shell
  6. 11. magma
  7. 13. thinner
  8. 14. mountain ranges
Down
  1. 1. fingernails
  2. 2. covered
  3. 4. folds
  4. 6. plates
  5. 8. ridge
  6. 9. million
  7. 11. melts
  8. 12. mantle