<P> 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 . </P>
<P> 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 . </P>
the west coast of south america is what plate boundary
the west coast of south america is what plate boundary
a convergent boundary with the subducting Nazca Plate
a convergent boundary with the subducting Nazca Plate