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- Tectonic Plate South American Plate
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The South American Plate is a continental tectonic plate which includes the continent of South America and also a sizeable region of the Atlantic Ocean seabed 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 and the oceanic crust of the North American Plate. At the Chile Triple Junction in Taitato - Tres Montes Peninsula, an oceanic ridge — the Chile Rise — is subducting under the South American plate.
The South American Plate is in motion, moving westward away from the Mid - Atlantic Ridge. The eastward moving and more dense Nazca Plate is subducting under the western edge of the South American Plate along the Pacific coast of the continent. This collision of plates is responsible for lifting the massive Andes Mountains and causing the volcanoes which are strewn throughout them.