Editing Nazca plate (section)

===Peru–Chile Trench===
{{See also|Peru–Chile Trench}}

The eastern margin is a [[convergent boundary]] [[subduction]] zone under the South American plate and the [[Andes Mountains]], forming the [[Peru–Chile Trench]]. The southern side is a [[divergent boundary]] with the Antarctic plate, the [[Chile Rise]], where [[seafloor spreading]] permits [[magma]] to rise. The western side is a divergent boundary with the [[Pacific plate]], forming the [[East Pacific Rise]]. The northern side is a divergent boundary with the [[Cocos plate]], the [[Cocos–Nazca spreading centre]].

The subduction of the Nazca plate under southern Chile has a history of producing massive [[earthquake]]s, including the largest ever recorded on earth, the [[moment magnitude scale|moment magnitude]] 9.5 [[1960 Valdivia earthquake]].