The Oceanic plate denser than the continental plat because it contain magnesium,which is denser than aluminum found in continental plates.
The Andes Mountain Range is a result of the Nazca Plate subducting under the South American Plate.
When the Nazca seafloor plate pushes into the South American continental plate, it creates a convergent boundary. This leads to subduction, where the denser oceanic plate is forced beneath the less dense continental plate. This process can result in the formation of deep oceanic trenches, volcanic arcs, and seismic activity such as earthquakes.
Andes, convergence between South American Plate and Pacific Plate
All major plates contain both continental and oceanic crust except for the Pacific and Nazca plates.
Answer this question… Subduction of oceanic crust beneath continental crust
The three subtypes of convergent plate boundaries are oceanic-continental, oceanic-oceanic, and continental-continental. At oceanic-continental boundaries, such as the Nazca Plate subducting beneath the South American Plate, volcanic mountain ranges like the Andes are formed. At oceanic-oceanic boundaries, like the Pacific Plate subducting beneath the North American Plate, island arcs such as the Aleutian Islands are created. Finally, at continental-continental boundaries, such as the collision of the Indian Plate with the Eurasian Plate, large mountain ranges like the Himalayas are formed.
It forms a convergent boundary with the South American Plate, divergent.
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The western coast of South America is a very good example of an oceanic to continental convergent boundary where the Nazca plate is colliding (and being subducted beneath) the South American plate.
At the boundary where the South American Plate meets the Nazca Plate, you can find subduction zones. The oceanic Nazca Plate is being forced beneath the continental South American Plate, forming a destructive plate boundary. This collision results in the formation of deep ocean trenches and the Andes mountain range due to the intense tectonic forces at work.
When an oceanic plate and a continental plate collide, the oceanic plate is always subducted. Oceanic plates are denser than continental plates, and they have a higher iron content. Since they are denser, oceanic plates always sink below the continental plate in the event of a collision.
The Andes were a result of the collision of the Nazca Plate & the South American Plate.