Doctoral Retreat Crossword Puzzle

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Across
  1. 4. Who needs peridotites when you have seismic waves?
  2. 8. Why does my mantle keep separating?
  3. 11. The process of leveling mountains
  4. 12. What happens to a rock when it's struck by a few 100kV of electricity?
  5. 13. Musicals, casinos and seismic waves
  6. 14. New addition to rock/paper/scissors
  7. 16. The process of building mountains
  8. 18. An insightful way of looking at things
  9. 19. Hephaestus' forge
Down
  1. 1. Expedition to Plato's lost city
  2. 2. Is there a salt crisis in Europe?
  3. 3. Should the doctoral retreat team have bought earthquake insurance?
  4. 5. Newly classified stony-iron rock
  5. 6. Science has come a long way from apple trees
  6. 7. What comes next?
  7. 9. Pay close attention. This poster could help you win $1,000,000
  8. 10. Are you struggling to find people to show off your rock collection to?
  9. 15. What's the weather like 1600m below?
  10. 17. High pressure cooker