What happens when oceanic oceanic plates collide?
Ocean-Ocean Collisions When two oceanic plates collide one oceanic plate is eventually subducted under the other. Where one plate slides under the other is referred to as the ‘subduction zone’. As the subducting plate descends into the mantle where it is being gradually heated a benioff zone is formed.
What is an example of a collision plate boundary?
Convergent boundaries: where two plates are colliding. Island arcs and oceanic trenches occur when both of the plates are made of oceanic crust. The denser oceanic plate is subducted, often forming a mountain range on the continent. The Andes is an example of this type of collision.
What does oceanic oceanic collision form?
Ocean-Ocean Convergence This plate subducts beneath the younger plate. As the subducting plate is pushed deeper into the mantle, it melts. The magma this creates rises and erupts. This forms a line of volcanoes, known as an island arc (Figure below).
What is a famous example of continental plate collision?
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.
Why does the oceanic crust sink?
It is due to the process of subduction; oceanic crust tends to get colder and denser with age as it spreads off the mid-ocean ridges. It gets so dense, that it sinks in the upper mantle (subduction). As the continental crust is lighter than the oceanic crust, the continental crust cannot subduct.
What do oceanic oceanic convergent boundaries form?
Oceanic/Oceanic Convergent Boundaries Such a convergent boundary includes a seafloor trench marking the earthquake-rattled subduction zone as well as an island arc: a line of volcanoes created by rock-melt in the mantle associated with subduction.
What are the 4 plate boundary?
There are four types of boundaries between tectonic plates that are defined by the movement of the plates: divergent and convergent boundaries, transform fault boundaries, and plate boundary zones.
What are the 2 types of tectonic plates?
The two types of tectonic plates are continental and oceanic tectonic plates.
What is the effect of oceanic oceanic?
The features of an ocean-ocean subduction zone are the same as those of an ocean-continent subduction zone, except that the volcanic arc will be a set of islands known as an island arc. The older plate subducts into a trench, resulting in earthquakes. Melting of mantle material creates volcanoes at the subduction zone.
What is an example of oceanic oceanic convergence?
Examples of ocean-ocean convergent zones are subduction of the Pacific Plate south of Alaska (creating the Aleutian Islands) and under the Philippine Plate, where it creates the Marianas Trench, the deepest part of the ocean.
What is the result of collision of two oceanic plates?
When two oceanic plates converge, the denser plate will end up sinking below the less dense plate, leading to the formation of an oceanic subduction zone. Old, dense crust tends to be subducted back into the earth. An example of a subduction zone formed from a convergent boundary is the Chile-Peru trench.