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
A tectonic plate boundary where one continental plate and one oceanic plate meet is known as a convergent boundary. In this scenario, the denser oceanic plate typically subducts beneath the lighter continental plate, leading to geological phenomena such as the formation of mountain ranges, volcanic activity, and earthquakes. An example of this is the boundary between the Nazca Plate (oceanic) and the South American Plate (continental), which has resulted in the Andes mountain range and significant volcanic activity.
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.
In the context of plate tectonics, the oceanic-continental boundary refers to the interaction between an oceanic plate and a continental plate. When these two plates converge, the denser oceanic plate typically subducts, or sinks, beneath the lighter continental plate. This process often leads to the formation of mountain ranges, deep ocean trenches, and volcanic activity along the continental edge. An example of this boundary is the subduction of the Nazca Plate beneath the South American Plate, resulting in the Andes mountain range.
It forms a convergent boundary with the South American Plate, divergent.
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At the boundary where the South American Plate meets the Nazca Plate, you can find oceanic crust being subducted beneath continental crust. This subduction zone is characterized by the Nazca Plate, which is primarily composed of oceanic crust, descending into the mantle under the continental crust of the South American Plate. This interaction leads to significant geological activity, including the formation of the Andes mountain range and frequent earthquakes in the region.
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.