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At Sea

by Nathan Fung

Each clue clues the name of one of the Earth's tectonic plates.

  1. NAZCA
  2. PACIFIC
  3. JUAN DE FUCA
  4. NORTH AMERICAN
  5. ARABIAN
  6. SANDWICH
  7. RIVERA
  8. EASTER
  9. CAROLINE
  10. SHETLAND
  11. COCOS
  12. INDIAN
  13. AUSTRALIAN
  14. EURASIAN
  15. SCOTIA
  16. PHILIPPINE

The diagram shows a plate adjacency graph where the lines connect the vertices corresponding to adjacent plates; however, there are four extra lines in the diagram. These lines connect the vertices corresponding to EASTER-SANDWICH-CAROLINE-SCOTIA-NORTH AMERICAN into a chain.

Reading the first letter of the plate name on the EASTER end of the chain, the second letter of the next in the chain, and so on gives the answer EARTH.