Question

how contenental plates formed and how are they eventually destroyed?

Answer 1

Earth's tectonic plates formed when 'massive molten plumes' ripped the crust apart: Tears formed and spread across the planet three billion years ago

They believe a vast plume of molten mantle may have risen up from deep inside the planet, pooling beneath the surface causing the hard crust, or lithosphere, above to weaken.



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Geologists believe they may have solved the mystery of what caused the tectonic plates to form on Earth around three billion years ago. Hot plumes from the mantle would have risen towards the crust to create weak spots (illustrated)



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The hot spots would have eventually created tears to form the boundaries of the continental plates (illustrated)

This weak spot would have stretched over time as more material from the deep mantle pooled there and it would have created a tear that then grew to create the boundaries of the tectonic plates.

Answer 2

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• According to geologists continents and oceans are actually situated on massive base of rocks called plates, that are floating on the mantle.

• Continental plates are formed due to the activities like sea floor spreading in which the lava raising up from the mantle are hardened into rock creating new rocks.

• These plates are constantly pushed and therefore keep moving slowly.

• This movement of plates is called plate tectonics.

• While this movement continues, they pushes/collide each other, a lot of pressure is excreted by each of them on the other.

• The plate thus going under into the mantle becomes molten.

• It actually pulls the rest of the plate in to the mantle. Thus the plate is destroyed.

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Q:- What are the different processes through which the surface of earth form? Write them?

• The tectonic plates in crust , wind and water erosion and deposition.

Q:- What are 7 major continental plains?

• Antarctic plate

• Eurassian plate

• Indo-australian plate

• North American plate

• Pacific plate

• South American plate

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