Chain Crosswords Long Geography Hard — Set 10

Hard 15×15 Set 10
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Across
  1. 1. A word related to geography
  2. 4. Shallow body of water near the coast
  3. 5. A word related to geography
  4. 7. Land completely surrounded by water
  5. 10. Treeless Arctic plain
  6. 11. A word related to geography
Down
  1. 1. Where a river meets the sea
  2. 2. Bowl-shaped depression
  3. 3. Flat elevated area of land
  4. 6. Large underground cave
  5. 8. Grassy plain with scattered trees
  6. 9. Narrow strip connecting two landmasses