Across
- 2. large areas of stable rock
- 8. supercontinent that formed over 300 million years ago
- 9. solid outer layer of Earth's sphere
- 10. plates move away from eachother
- 11. cycle super continents form and break apart overtime
- 13. tectonics theory that explains how plates move and change shape
- 17. spreading ocean lithosphere as magma rises and solidifies at a mid-ocean range
- 19. rocks within the cratons that have been exposed by Earth's surface
- 20. solid plastic layer of the mantle
Down
- 1. plates collide with eachother
- 3. small coral mountains
- 4. underwater mountains
- 5. ridges undersea mountain ranges
- 6. pieces of lithosphere that has a unique geologic history
- 7. continent breaks apart
- 12. single large ocean that surrounded pangea
- 14. study of the magnetic properties of rocks
- 15. plates slide past eachother horizontally
- 16. drift continents were once formed together but drifted apart
- 18. valley narrow valley that forms where the plates seperate