Question

The Andes, which are volcanic mountains, are shown at the boundary between the South American Plate and Nazca Plate.
Which events most likely occurred at the boundary between the South American Plate and the Nazca Plate? Check all that apply.

destruction of crust
creation of rift valleys
formation of a trench
separation of two plates
subduction of one plate

Answer 1

- destruction of crust — yes (the oceanic Nazca Plate is being consumed)
- formation of a trench — yes (the Peru–Chile trench formed at the convergent margin)
- subduction of one plate — yes (the Nazca Plate subducts beneath South America)

Not likely: creation of rift valleys or separation of two plates (those occur at divergent boundaries).