Physical Geog puzzle

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Across
  1. 4. A sedimentary rock that is pure calcium carbonate
  2. 5. Much of this rock type in Ireland is Old and Red
  3. 10. A sedimentary rock that is a useful fuel
  4. 11. A heavy metal mined in Tara Mines
  5. 12. Living things preserved in rock
  6. 16. Rocks formed by compaction and cementation
  7. 17. Limestone is its parent
  8. 19. One of the metals that makes up the core
  9. 20. Rocks changed by heat and pressure
  10. 21. Repetitive layering in metamorphic rocks
  11. 22. The volcano that destroyed Pompeii
  12. 24. Igneous rocks formed inside the crust
  13. 26. This rock sounds lovely
  14. 29. A small cavity in rock lined with crystals or other mineral matter
  15. 30. A country that sits on a mid-ocean ridge
  16. 31. The cementing agent in sandstone
  17. 32. The plate that Somalia sits on
Down
  1. 1. A sudden shaking in the crust
  2. 2. The company that owns Tara mines
  3. 3. Period of mountain building 400 million years ago
  4. 6. Studies earthquakes
  5. 7. Rock that makes up the Derry-Antrim plateau
  6. 8. Proposed the theory of continental drift
  7. 9. The type pf plate boundary where plates separate
  8. 13. Rocks formed by crystallisation
  9. 14. The rigid part of the crust and upper mantle
  10. 15. The process of fold mountain building
  11. 18. Where the shockwaves from an earthquake originate
  12. 23. A type of metamorphism caused by heat only
  13. 25. A volcano that will never erupt again
  14. 27. When an earthquake occurs at sea
  15. 28. One of the minerals that granite is made from