Across
- 2. dry streambed
- 3. liquid rock
- 5. smooths out a rough surface
- 6. soil deposited by wind
- 7. layer of rock that holds water
- 10. scientist who studies rocks
- 12. rock from cooled lava
- 14. large waterfalls
- 16. temporarily inactive
- 17. heavy rain
- 18. huge boulder carried by a glacier
Down
- 1. the folds and faults of the earth
- 4. rock formed from sand, rocks, and shells
- 8. to decay or rot
- 9. breaks in the Earth's crust
- 11. long crack in the Earth's crust
- 13. lava rock
- 15. mudflow