What is the Region?

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Across
  1. 2. ____ and range.
  2. 6. flat dry place
  3. 8. East of Appalachians
Down
  1. 1. great harbors
  2. 3. The mountains in the east
  3. 4. the shape of Canadian shield
  4. 5. Coastal _____ (west of Rocky)
  5. 7. The newer and sharper mountains