<Tr> <Th> Features </Th> <Td> Pacific Ocean </Td> </Tr> <Tr> <Td_colspan="2"> Relative to the African Plate </Td> </Tr> <P> The Nazca Plate, named after the Nazca region of southern Peru, is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America . The ongoing subduction, along the Peru--Chile Trench, of the Nazca Plate under the South American Plate is largely responsible for the Andean orogeny . The Nazca Plate is bounded on the west by the Pacific Plate and to the south by the Antarctic Plate through the East Pacific Rise and the Chile Rise respectively . The movement of the Nazca Plate over several hotspots has created some volcanic islands as well as east - west running seamount chains that subduct under South America . Nazca is a relatively young plate both in terms of the age of its rocks and its existence as an independent plate having been formed from the break - up of the Farallon Plate about 23 million years ago . The oldest rocks of the plate are about 50 million years old . </P> <P> A triple junction, the Chile Triple Junction, occurs on the seafloor of the Pacific Ocean off Taitao and Tres Montes Peninsula at the southern coast of Chile . Here three tectonic plates meet: the Nazca Plate, the South American Plate, and the Antarctic Plate . </P>

What type of plate boundary is on the west coast of south america
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