Fold Mountains

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Across
  1. 4. Type of plate boundary that forms fold mountains
  2. 6. Plate that collided with the Eurasian plate to form Ireland fold mountains
  3. 7. Period of folding that formed much of the World's younger fold mountains
  4. 8. A famous Irish fold mountain
Down
  1. 1. Period of folding that formed Irish mountains
  2. 2. The upfold or ridge of a fold mountain
  3. 3. The downfold or valley of a fold mountain
  4. 5. Fold mountain range in South America