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- 1There are 3 types of plate margins; Destructive, Constuctive and Conservative. Destructive is when the move together, Constuctive is when the move apart& Conservative is when they slide past each other.Fold mountains and ocean trenches;
Both are landforms that occur at destructive plate margins.
FOLD MOUNTAINS - First, thick sediment layers form in huge depressions called geosynclines under the sea. Over millions of years the sediments are compressed into rock. The sedimentary rocks are forced into folds as the plates move.
OCEAN TRENCHES - Ocean trenches are formed in the subduction zone of a destructive plate margin. One wall of the trench is formed by the subducting oceanic crust. The other wall is the edge of the continental crust.
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