Across
- 3. a steep narrow canyon
- 6. having little or no vegetation
- 8. caving of rocks from ice or water
- 10. an animal's skin
- 11. Earth's surface
- 13. a thick wall
Down
- 1. 1st president
- 2. approval or agreement
- 4. to dig
- 5. magma or melted rock
- 7. to approrve
- 9. milk products
- 12. large farm