Across
- 1. the present epoch
- 3. soil horizon
- 4. a soluble salt
- 7. single-celled alga
- 8. water vapor above a heat source
- 10. ancient writing system
- 14. take away trees
- 17. a supercontinent
- 18. loose stones on a mountain
Down
- 1. extreme hurricane
- 2. single-celled flagellate
- 4. ridge-shaped stratified rock
- 5. growing plants without soil
- 6. defensive wall
- 9. renewing forest cover
- 11. clay particles from the wind
- 12. single-celled planktonic animal
- 13. frozen soil
- 15. tides discoloration of seawater by a bloom of toxic red dinoflagellates
- 16. redeposited rocks