The ongoing subduction, along the Peru–Chile Trench, of the Nazca Plate under the South American Plate is largely responsible for the Andean orogeny. The Nazca Plate is bounded on the west by the Pacific Plate and to the south by the Antarctic Plate through the East Pacific Rise and the Chile Rise respectively.
What plate boundary is the South American Plate?
The northern edge of the South American Plate forms a boundary with the Caribbean Plate and the oceanic crust of the North American Plate. The South American Plate extends eastward to the African Plate. The two plates are pulling apart from each other.
Is the Nazca Plate growing or shrinking?
The Nazca Plate is moving eastwards, towards the South American Plate, at about 79mm per year.
How did the South American and African plates move?
How did the South American Plate and African Plate move? Earth’s plates move on top of a soft, solid layer of rock called the mantle. … The South American and African Plates moved apart as a divergent boundary formed between them and an ocean basin formed and spread.
Which plate touches the west coast of South America?
At the Chile Triple Junction, near the west coast of the Taitao–Tres Montes Peninsula, an oceanic ridge known as the Chile Rise is actively subducting under the South American Plate.
|South American Plate|
|Features||South America, Atlantic Ocean|
|1Relative to the African Plate|
Which type of plate boundary is between the South American Plate and Antarctic plate?
The Antarctic Plate is bounded almost entirely by extensional mid-ocean ridge systems. The adjoining plates are the Nazca Plate, the South American Plate, the African Plate, the Somali Plate, the Indo-Australian Plate, the Pacific Plate, and, across a transform boundary, the Scotia Plate.
Is the Nazca Plate destructive?
This type of destructive plate boundary is characterised by the west coast margin of South America. Here, the oceanic lithosphere of the Nazca Plate is being subducted beneath the overriding continental lithosphere that forms the western part of the South American Plate.
Why is the Nazca Plate is moving faster than the mantle beneath it?
The farther the ocean crust slides under the continental crust, the more it pulls on the rest of the plate, making it move faster than it would if just the current itself were responsible for its movement.