Chain Crosswords Medium Chain Geography Medium — Set 7

Medium 13×13 Set 7
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Across
  1. 3. Zone between latitude lines
  2. 6. Large flat area of land
  3. 7. Narrow steep-sided valley
  4. 8. Shallow area in a body of water
Down
  1. 1. Vast grassy treeless plain
  2. 2. A word related to geography
  3. 4. Wetland area with grasses
  4. 5. Narrow body of water between islands