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Ocean trenches and Island arcs.

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What boundary is it called when an oceanic plate descends beneath a continental plate?

It's called destructive plate margin/boundary, or convergent plate margin though this term applies to all plate margins where two plates are moving towards each other (such as continental + continental or oceanic + oceanic).


What does a continental margin have that an active margin does not?

Subduction. A subduction trench.


What does a active continental margin have that a passive margin does not?

Subduction. A subduction trench.


Subduction of oceanic lithosphere under a continental block gives rise to what type of geologic structure that is characterized by a continental volcanic arc and associated igneous plutons?

The subduction of oceanic lithosphere under a continent forms a volcanic arc on the continental margin. This arc is characterized by intense volcanic activity producing a chain of stratovolcanoes and igneous plutons intruding into the continental crust.


What is a subduction zon as it relates to earth science?

A subduction zone is a place at the margin of a continent where the neighbouring oceanic plate is 'subducted'. That is, the oceanic plate, moving toward the continental plate, goes down into the mantle because it is heavier than the continental plate. Subduction zones typically cause deep ocean trenches.


A passive continental margin has a while an active margin does not.?

An active continental margin may have a trench.


What is continental margin?

The continental margin is the zone of the ocean floor that separates the thin oceanic crust from thick continental crust.


Is An oceanic plate and continental plate colliding?

When an oceanic plate collides with a continental plate, the denser oceanic plate typically subducts beneath the lighter continental plate due to the difference in density. This subduction can lead to the formation of volcanic mountain ranges along the continental margin. The oceanic plate may also undergo partial melting, leading to the formation of magma that can erupt to the surface.


What does the continental margin consist of?

The continental margin is the zone of ocean floor that separates oceanic crust and continental crust. It accounts for 28% of all oceanic area.


Which portion of the continental margin serves as a boundary between the oceanic crust and the continental crust?

The portion of the continental margin that serves as a boundary between the oceanic crust and the continental crust is called the continental shelf. This is the shallowest part of the margin, located between the shoreline and the continental slope.


The margin of a continent is the boundary between continental crust and?

oceanic crust


What are plates moving toward each other?

Plates that move toasted each other are detractive plates meeting at a destructive margin. If a continental and an oceanic plate move towards each other, earthquakes and volcanoes occur, this is called a subduction margin, but if the plates are both continental then fold mountains form this is a collision margin