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