land names

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Across
  1. 1. A deep narrow vally with steep sids
  2. 3. Land that is much higher then its surroundings;larger than a hill
  3. 5. A pice of land complitly surround by water
  4. 6. A coral reef in the shape of a ring or a horseshoe
Down
  1. 2. A group of islands made up of the crests of an underwater mountain range
  2. 4. A raised part of the earths surface hills are smaller then mountens