Across
- 4. where geological feature is cut in half
- 5. study of magnetic fields frozen in rocks
- 10. 1959, used ridge patterns
- 12. more dangerous volcanic eruption
- 15. releasing bend,can form depressions
- 16. less deadly type of eruption
- 17. used to create first detailed ocean floor map
- 18. plates that spread away from each other
- 20. measure of strength of earthquake
- 21. when one plate slides beneath another
Down
- 1. developed continental drift theory
- 2. zone where plates split apart
- 3. molten rock found within volcanic chambers
- 6. compression added to shearing motion
- 7. large but not steep volcano
- 8. lava that forms tubes,smooth and ropy
- 9. volcano,felsic to intermediate rock
- 11. most dangerous volcano
- 13. most typical volcano
- 14. plates that come towards each other
- 19. type of lava that erupts underwater