The west coast of South America and the east coast of North America have very different continental margins.

Question

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The west coast of South America has an active continental margin where the Nazca Plate is subducting beneath the South American Plate, leading to volcanic activity, earthquakes and the formation of the Andes. In contrast, the east coast of North America has a passive continental margin with no significant tectonic activity or volcanic activity, resulting in a relatively smooth continental shelf.

The West Coast of South America and the East Coast