Everything about The South American Plate totally explained
The
South American Plate is a
tectonic plate covering the
continent of
South America and extending eastward to the
Mid-Atlantic Ridge.
The easterly side is a
divergent boundary with the
African Plate forming the southern part of the
Mid-Atlantic Ridge. The southerly side is a complex boundary with the
Antarctic Plate and the
Scotia Plate. The westerly side is a
convergent boundary with the subducting
Nazca Plate. The northerly side is a boundary with the
Caribbean Plate.
The remains of the
Farallon Plate, split into the current
Cocos Plate and
Nazca Plate are still subducting under the western edge of the South American Plate. This subduction is responsible for lifting the massive
Andes Mountains and causing the volcanos which are strewn throughout them. There is some speculation that in addition to subducting the Cocos and Nazca Plates, the westward motion of the South American Plate may have forced the Caribbean and Scotia Plates at its northern and southern ends respectively to squeeze around it. Both share a similar shape and are being subducted along their eastern boundary. They are thought to be ancient volcanic regions formed on the Farallon Plate, with their crust too thick to be subducted under the South American Plate.
There is evidence that South American plate continues to move northwards at a very slow rate.
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