the formation of the south american plate continental or oceanic
The South American Plate is moving westwards due to sea floor spreading at the Mid Atlantic Ridge. Where it meets the Caribbean Plate, it descends (subducts) beneath it.This is because the oceanic lithosphere of the South American Plate is cooler and denser than that of the Caribbean Plate.he South American Plate is moving westwards due to sea floor spreading at the Mid Atlantic Ridge. Where it meets the Caribbean Plate, it descends (subducts) beneath it.