What is Ocean-Ocean convergent boundary?
At an ocean-ocean convergent boundary, one of the plates (oceanic crust and lithospheric mantle) is pushed, or subducted, under the other (Figure 4.6. 1). It mixes with the overlying mantle, and the addition of water to the hot mantle lowers the crust’s melting point and leads to the formation of magma (flux melting).
What do oceanic oceanic boundaries form?
Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges. While the process of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.
What happens when oceanic and oceanic plates converge?
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.
Do ocean-ocean convergent boundaries form volcanoes?
Volcanoes at convergent plate boundaries are found all along the Pacific Ocean basin, primarily at the edges of the Pacific, Cocos, and Nazca plates. The Cascade Range is formed by volcanoes created from subduction of oceanic crust beneath the North American continent.
What are the 3 types of convergent boundary?
Convergent boundaries , where two plates are moving toward each other, are of three types, depending on the type of crust present on either side of the boundary — oceanic or continental . The types are ocean-ocean, ocean-continent, and continent-continent.
What geologic features are formed in oceanic oceanic convergence?
When two oceanic plates converge, both a trench and a string of volcanoes are formed. These volcanoes can build to produce island chains, such as the Mariana Islands, which are located alongside the Marianas Trench.
How are oceanic oceanic and oceanic continental convergent boundaries different?
Oceanic plates are much thinner than the continental plates. When an oceanic plate meets a continental plate at a convergent boundary the oceanic plate is forced under the continental plate and destroyed. The convergent boundaries between ocean and continental plates create subduction zones.
What is formed when the oceanic plate collide?
A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs. Earthquakes generated in a subduction zone can also give rise to tsunamis.
What type of mountains are produced by ocean-ocean convergence?
Introduction. Sometimes an entire ocean closes as tectonic plates converge, causing blocks of thick continental crust to collide. A collisional mountain range forms as the crust is compressed, crumpled, and thickened even more.
What landforms are created at oceanic oceanic convergent boundaries?
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 5 different types of plate boundaries?
What are the major plate tectonic boundaries?
- Divergent: extensional; the plates move apart. Spreading ridges, basin-range.
- Convergent: compressional; plates move toward each other. Includes: Subduction zones and mountain building.
- Transform: shearing; plates slide past each other. Strike-slip motion.
How are oceanic-oceanic and oceanic-continental convergent boundaries different?
What is a real world example of a convergent boundary?
Start by rolling out two flat sections of clay,each of a different color. These are going to be your tectonic plates.
What are the examples of convergent boundary?
Mid-Atlantic Ridge.
What are the three different types of convergent boundaries?
• There are three types of convergent plate boundaries: oceanic-oceanic boundaries, oceanic-continental boundaries, and continental-continental boundaries. Each one is unique because of the density of the plates involved. • Convergent plate boundaries are often the sites of earthquakes, volcanoes, and other significant geological activity.
What is a continental – oceanic convergent boundary?
What is oceanic-continental convergent boundary? When two plates come towards each other they create a convergent plate boundary. The plates can meet where both have oceanic crust or both have continental crust, or they can meet where one has oceanic and one has continental. The oceanic plate subducts into a trench, resulting in earthquakes.