Convergent Plate Boundaries
In the past lessons, We've learned about the Plate tectonics and Divergent boundaries. Now, you will learn about Convergent
Boundaries and show some pictures.
LET'S START!
What is Convergent Boundaries?
These Convergent boundaries happens when two plates are collide and it's called subduction. In this case, the submerges under the continental plate forming a deep ocean trench just offshore. Creating a magma, water released from the subducting plate lowers the melting temperature of the overlying mantle wedge. This magma tends to be very viscous due to its high silica content. If does not reach the surface and cools at depth, when it does reach the surface, a volcano is formed.
Convergent Boundaries also known as a Destructiveplate boundary because when oceanic and continental plates move together the oceanic plate is forced under the lighter continental plate. Let's know about the different types of Convergent Plate Boundaries:
First, Oceanic-Continental Convergence.
Oceanic-continental convergences are created whenever an oceanic plate pushes into and moves underneath a continental plate. The continental plate that overrides the oceanic plate actually lifts up to create a mountain range. As the oceanic plate sinks, it slides into the newly formed trench, and smaller pieces break off. The pieces remain in place for years until generating earthquakes that lift up the land.
Second, Oceanic-Oceanic Convergence
Oceanic-oceanic convergences occur when two oceanic plates meet and one oceanic plate is pushed underneath the other. During that process of subduction, a deep trench is formed. The Marianas Trench is an example of an oceanic-oceanic convergence. The southern end of the Marianas Trench plunges 11,000 meters into the earth's interior. Volcanoes also form as a result of an oceanic-oceanic convergence.
Third, Continental-Continental Convergence
Continental-continental convergences are different from two oceanic plates meeting together. Continental crusts are too light to be carried down into a trench. As a result, neither plate is pushed underneath the other. The continental plates converge, buckle, and later compress to create tall mountain ranges on earth. The Himalayas are an example of a mountain range formed from continental-continental convergence.
That's all. Thankyou! Moreee Learnings in this blog.
Scienthetic
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References:
http://www.worldlibrary.org/articles/potentially_active_volcano#Convergent_plate_boundaries
https://sciencing.com/three-types-convergent-boundaries-7501192.html