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Across
  1. 3. Slow-moving swampy stream
  2. 5. Elevated terrain region
  3. 7. Loose rock debris
  4. 9. Fracture in crust
  5. 12. Forested wetland
  6. 13. Scottish river estuary
  7. 14. Ridge top line
  8. 16. Small rounded hill
  9. 17. Broad sea inlet
  10. 18. Narrow stream
  11. 20. Curved natural rock formation
  12. 23. Open grassy field
  13. 25. Low hills near mountains
  14. 26. Coastal lowland
  15. 29. Steep-sided small valley
Down
  1. 1. Land sliding downward
  2. 2. Soft waterlogged ground
  3. 4. Narrow sand peninsula
  4. 6. Wetland with grasses
  5. 8. Raised narrow elevation
  6. 10. High flat-topped land
  7. 11. Stone pile for markers
  8. 15. Rise and fall of sea
  9. 17. Rock layers in Earth
  10. 19. Mountain's top point
  11. 21. Large earth crack
  12. 22. Low sunken area
  13. 24. Glacially formed ridge
  14. 27. Steep rugged rock
  15. 28. Broad sea curve