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Oceanic crusts; the Mid-Atlantic Ridge and East Pacific Rise at zones of seafloor spreading and crustal extensions.

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Q: 2 types of crust involved at constructive plate margins?
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Related questions

Do earthquakes occur at constructive margins?

yes earthquakes do occur on constructive margins and also the other plate margins as well. in fact all of them


What is the difference between constructive and destructive plate margins?

a constructive (divergent) plate boundary, new crust is being created to infill the gaps caused by spreading plates. At a destructive (subduction-convergent) plate boundary, old, dense oceanic crust is diving into, and becoming part of the mantle.Read more: What_is_the_difference_between_a_constructive_plate_boundary_and_a_destructive_plate_boundary


How does oceanic crust form at constructive plate margins?

Do you mean spreading centres or oceanic ridges, where the oceanic lithosphere is renewed by hot, less dense rock rising in convection zones.


According to the theory of sea floor spreading new rock is added to the plates at?

...at constructive plate margins / boundaries.hence the term contructive, new crust is "contructed" here.(and destructed at a destructive plate margin / boundary / subduction zone.)


What are constructive plates?

Constructive plate margins are when two plates move away from each other, creating more ocean floor.


What are the three types of plate margins?

Divergent (Constructive) Convergent (Destructive) Transform Fault (Conservative)


What type plate margin are ocean trenches associated with?

Convergent plate margins where oceanic crust is being subducted under continental crust.


What boundary creates a crust?

The Divergent Boundaries.


Why does the oceanic crust move below continental crust?

The basaltic oceanic crust is more dense than the granitic continental crust. Therefore, when the two meet at plate margins, the oceanic crust usually subducts beneath the continental plate.


How do volcanoes form at constructive plate margins?

At constructive boundaries, magma from the earth's interior rises to the surface and forms mostly fissure volcanoes, but a few other tyopes as well, and forms new crust which pushes away older crust At destructive boundaries, in a process called subduction, an oceanic plate slides into the earth's mantle, where it melts. The molten roick then rises to the surface and fornms a chain of volcanoes, mostly stratovolcanoes, but a few of other types as well


Compare and contrast composite and shield volcanos?

Shield Volcanoes - Wide base found at constructive plate margins Composite Volcanoes - Steeper Sides found at Destructive (subduction) margins


How Compare shield volcanoes and composite volcanoes?

Shield Volcanoes - Wide base found at constructive plate margins Composite Volcanoes - Steeper Sides found at Destructive (subduction) margins