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Q: What kind of plate boundary cost old and heavy crust to sink in to the mantle?
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How the thin outer crust is floating on the thick liquid mantle causing the crust to move and form a divergent plate boundary?

how the thin outer crust is floating on the thick liquid mantle, causing the crust to move and form a divergent plate boundary


What does moho stand for?

"moho" is the plate boundary between earth's crust and the mantle.


What is likely happening at the boundary between the Nazca plate and the South American plate?

Answer this question… Subduction of oceanic crust beneath continental crust


Where oceanic crust collides with continental crust is the?

This type of plate boundary is a convergent boundary where subduction of the denser oceanic slab into the mantle will occur. Because of this it may also be called a destructive margin.


What causes magma to form a divergent plate boundary?

At a divergent plate boundary the crust is thin. This reduces pressure on the upper mantle, lowering the melting point and allowing some rock to melt.


What is subuction?

subduction is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.


Is Mt Etna on a convergent divergent or transform plate boundary?

Mount Etna Was Formed By Destructive Plate Boundaries. This Is When One Crust Is Forced Under Another Crust. It Stands At The Convergent Boundary Where The African Crust Is Being Sub Ducted Beneath The Eurasian Crust. This Causes The Latter To Deform And Forces the Magma Up Into Weak Spots In The Earths Crust (mount Etna) When There Has Become To Much Of A Magma Build Up In The Mantle.


What do you call a plate boundary in which no new crust is made or destroyed?

recessive plate boundary


What boundary does new crust form at?

Divergent plate boundary.


What type of plate boundary destroys crust?

Convergent boundary


Which plate boundary destroys crust?

Crust is destroyed at the convergent plate boundary. This is usually between the oceanic and continental plates. This is where subduction of the more dense crust occurs.


What is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary called?

This process is called subduction.