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Across
  1. 2. Long glacial ridge
  2. 4. Small water-formed valley
  3. 7. Large free-standing rock
  4. 8. Floating glacial ice
  5. 9. Enclosed lowland area
  6. 10. High cliff or bank
  7. 12. Large ice sheet in ocean
  8. 14. Fan-shaped sediment areas
  9. 15. Route through mountains
  10. 19. Elevated flat-topped area
  11. 21. Series of waterfalls
  12. 23. Large open chambers underground
  13. 25. High flat region
  14. 27. Excavation site for minerals
  15. 29. Related to northern forests
  16. 30. Gradual land wearing process
Down
  1. 1. Steep rugged rock
  2. 3. Land beside a waterbody
  3. 5. Elevated rugged region
  4. 6. Glacier-carried debris ridge
  5. 11. Low hills near mountains
  6. 13. Earth collapse downhill
  7. 16. Cold treeless land
  8. 17. Natural underground hollows
  9. 18. Long narrow elevations
  10. 20. Cold Arctic regions
  11. 22. Upper forest layer
  12. 24. Related to river deposits
  13. 26. Region near equator
  14. 28. Grass-covered field