Geology. The trench is a result of a convergent boundary, where the eastern edge of the oceanic Nazca Plate is being subducted beneath the continental South American Plate. Two seamount ridges within the Nazca Plate enter the subduction zone along this trench: the Nazca Ridge and the Juan Fernández Ridge.Click to see full answer. Also question is, what type of plate boundary is Chile on?The Nazca Plate, borders the South American Plate for most part of the continent. But towards the tip of the continent and bordering Chile is the Antarctic Plate.Subsequently, question is, what type of plate boundary is Peru? Peru is situated along the boundary of two tectonic plates: the Nazca Plate and the South American Plate. The interface between these two plates is located near the Peruvian coast. At a rate of about 50 mm per year the South American Plate is moving towards the Pacific Ocean over the Nazca Plate. Considering this, what type of plate boundary is the Andes Mountains? The Andes Mountain Range of western South America is another example of a convergent boundary between an oceanic and continental plate. Here the Nazca Plate is subducting beneath the South American plate.How was the Peru Chile trench formed?Some of the most familiar ocean trenches are the result of this type of convergent plate boundary. The Peru-Chile Trench off the west coast of South America is formed by the oceanic crust of the Nazca plate subducting beneath the continental crust of the South American plate.
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