earthquakes, volcanos and rocks

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Across
  1. 4. Tremors that follow an earthquake
  2. 5. Hot fluid from the earths crust
  3. 6. A massive wave caused by a certain natural disturbance
  4. 7. The outer layer of the earth
  5. 8. A wave of energy generated by an earthquake
  6. 9. A type of rock which has undertaken transformation by heat, or pressure
  7. 11. The scale that determines the size of an earthquake
  8. 13. The crust and upper layer of the earth
  9. 14. The point within the earth where an earthquake initiates
  10. 17. A rock formed from consolidated clay sediments
  11. 19. Sudden collapse of land going down hill, often triggered by earthquakes
Down
  1. 1. The result of when tectonic plates collide, causing great destruction at times
  2. 2. A magma filled cavity beneath the earths surface
  3. 3. Surface along which plates brake and move
  4. 6. Segments of land which make up the earth
  5. 10. A rock that has been solidified from lava and magma
  6. 12. A mountain/hill having a vent of which lava can pour out of from the earths mantle
  7. 15. A large circular depression in the earths surface
  8. 16. A fractured line on a rock surface and were 2 plates meet
  9. 18. A number that measures the size of an earthquake