Across
- 3. formed when land between two parallel faults sink
- 4. super continent that existed million years ago
- 10. when both plates collide and buckle upwards
- 14. proposed the theory of seafloor spreading
- 17. downward part of a fold
- 18. plates collide at this boundary
- 20. upward part of a fold
- 21. energy production that uses heat from igneous rocks
- 22. large mass of igneous rock that forms when magma cools slowly to form granite.
- 23. causes the plates to move
Down
- 1. another word for destructive boundaries
- 2. a coastal area where most destructive volcanoes occur
- 5. proposed the theory of continental drift
- 6. Land forced upward from a reverse fault
- 7. a mountain building period
- 8. A scale that measures strength of an earthquake
- 9. flat-topped upland areas made of basalt rock
- 11. orogeny that occurred 400mya
- 12. someone who studies earthquakes
- 13. upper mantle combined with crust
- 15. heavier plate sinking under a lighter plate
- 16. a famous fault line in America
- 19. This occurred in Japan in 2011