Across
- 2. Low areas in rift valleys
- 7. Fault-block mountains
- 8. Mostly under water
- 11. Covers much of northeastern Canada
- 13. Plates are moving apart
- 15. Extinct volcano under water
- 16. A normal fault formed deep underground
Down
- 1. Zone that features rifts
- 3. A mountain range in the US containing fold mts.
- 4. Downward fold of rock
- 5. Formed arched layers
- 6. Plates moving toward each other
- 9. Wrinkles in the earth's crust
- 10. Center is older than the surrounding rock
- 12. Uplift landform
- 14. Magma Empty magma chamber deep underground