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Why do you find volcanoes at convergent and divergent boundaries but not at transform boundaries?

Convergent and divergent boundaries melt rock in the upper mantle while transform boundaries do not. Convergent boundaries that involve at least one oceanic plate form subduction zones, where an oceanic plate plunges into the mantle. Volatiles carried into the mantle lower the melting point of the rock there, allowing magma to form.At divergent boundaries the crust becomes thinner. This reduces pressure on the upper mantle, thus lowering melting points and generating magma.Transform boundaries have no such means of producing magma.


What is one name of a divergent plate boundary that there are?

Divergent plate boundaries occur where two plates are moving away from each other, and "new ground" is being formed. The oceans all have divegent boundaries at the mid-oceanic ridges. Another one is in eastern Africa in what is known as the Great Rift Valley. This will someday split the African continent apart.


Where does new sea floor form?

It forms at the edges of Divergent Tectonic Plates; as opposed to the Earthquakes that are found at the Convergent Plate Boundaries [where one Plate subsides beneath the other Plate].


What causes a rift valley to form at divergent boundaries?

When plates diverge, the crust in between them is pulled thin. This tension creates a rift valley, such as the one found between the two islands of New Zealand. Over time, the stretched crust with grow so thin that rising magma will break its surface, forming an underwater ridge.


How is volcanic activity associated with plate boundaries?

90% of volcanic activity on earth occurs at either convergent or divergent plate boundaries. The remaining 10% occurs at hot spots, which are not associated with plate boundaries.

Related Questions

What type of plate boundary causes shear stresses?

Shearing stress is one of three kinds of stresses. Compressional and tensional are the others. Shearing stress is associated with transform. The other two kinds of plate boundaries are convergent and divergent.


Is subduction common at divergent plate boundaries?

No, subduction is not common at divergent plate boundaries. Divergent plate boundaries are characterized by plates moving away from each other, which creates new oceanic crust. Subduction occurs at convergent plate boundaries where plates collide and one descends beneath the other.


What are the four plate boundaries?

The four types of plate boundaries are divergent boundaries (plates moving apart), convergent boundaries (plates moving together), transform boundaries (plates sliding past each other), and subduction zones (one plate sinking beneath another).


What forms mid-ocean valleys?

Divergent, one of the three Plate boundaries.


Types of plate boundaries?

The three main types of plate boundaries are divergent boundaries (plates move apart), convergent boundaries (plates move toward each other), and transform boundaries (plates slide past each other horizontally). At divergent boundaries, new crust is formed as magma rises to the surface, while at convergent boundaries, crust is destroyed as one plate is subducted beneath another. Transform boundaries are characterized by earthquakes as the plates grind past each other.


What are the 3 types of plate boundarys?

divergent plate boundary- a boundary where two plates move apart from each other. convergent plate boundary- a boundary where two plates move towards each other so that one plate can sink beneath the other. transform plate boundary- a boundary where one plate slips along side another plate.


What causes the plates to move that make an earthquake?

Earthquakes are caused by the buildup of stress at plate boundaries where tectonic plates are in contact. When the stress exceeds the strength of the rocks, the plates suddenly slip past one another, releasing stored energy in the form of seismic waves that shake the ground. This movement is what causes earthquakes.


Where are rift boundaries formed at and what happens at them?

A rift boundary is a divergent boundary, where two plates of the earth's crust are moving away from each other. Divergent boundaries occur at mid-oceanic ridges on the sea floor, but usually the term rift is used to describe divergent boundaries on the land. The best known one is in eastern Africa.


Which plate boundaries volcanoes are found along?

Volcanoes typically occur at two different types of plate boundaries. These two plate boundaries are: the diverging plate boundary where plates separate, and the converging plate boundaries where one plate is beneath another one at subduction zones.


Is a stratovolcano a divergent volcano?

No, a stratovolcano is not a divergent volcano. Stratovolcanoes are typically found at convergent plate boundaries where one tectonic plate is being subducted beneath another, leading to the formation of explosive volcanoes. Divergent volcanoes, on the other hand, are associated with divergent plate boundaries where plates move away from each other, creating rift zones and shield volcanoes.


How are the movement of plates at divergent boundaries and at the transform boundaries similar?

The difference between transform and divergent boundaries is that transform boundaries occur when tectonic plates slide past each other, whereas at divergent boundaries they move away from each other. However in both cases the plates move horizontally (unlike at convergent boundaries where one plate may be pushed underneath another).


Plates move apart at what boundary?

divergent