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Across
  1. 2. Curve in coastline
  2. 4. Site for stone extraction
  3. 6. Coastal area exposed at low tide
  4. 8. Glacially carved sea inlet
  5. 10. Ridge of glacial debris
  6. 13. Land surrounded by water on three sides
  7. 16. Crack in Earth's crust
  8. 17. Dry desert stream bed
  9. 18. Large crack in Earth's surface
  10. 19. Narrow landform of sand
  11. 22. Land separating watersheds
  12. 25. Grassy tropical biomes
  13. 27. Small freshwater stream
  14. 28. Hot spring that erupts
  15. 30. Narrow valley caused by erosion
Down
  1. 1. Boreal forest biome
  2. 3. Flat step-like landform
  3. 5. Group of islands
  4. 7. Inclined land surfaces
  5. 9. Open grassy area
  6. 11. Dry, arid regions
  7. 12. Remote inland region
  8. 14. Depression on a volcano's summit
  9. 15. Low hills at mountain base
  10. 20. High land extending into water
  11. 21. Natural underground hollows
  12. 23. Floating glacial ice
  13. 24. River meets the sea
  14. 26. Related to northern forests
  15. 29. Small stream of water