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The subducting plate (oceanic) dives downward toward the mantle. Because of the geothermal gradient, temperature with depth increases; this, along with the introduction of large amounts of water which is present in the oceanic crust, will result in partial melting of the subducting lithosphere . The melting occurs in the asthenosphere, which is the ductile rock of the upper mantle. Because the magma is less dense than the surrounding rock, it will rise, and may result in the formation of plutonic rock deep underground, or in the eruption of lava onto the surface.
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Which boundaries are likely to result in volcanic island arcs?
Volcanic island arcs are likely to result from convergent boundaries where an oceanic plate subducts beneath another oceanic plate or a continental plate. The subducted plate can melt, causing magma to rise and form a series of volcanic islands above the subduction zone.
What is the major type of stress at convergent plate boundaries?
Subduction, is when one plate is pushed down into the magma, by the other plate sliding over the top.
What geologic regions produces the greatest volume of magma?
Subduction zones, where one tectonic plate slides beneath another, tend to produce the greatest volume of magma. The intense heat and pressure created during this process can cause melting of the subducted plate, leading to significant magma production. This magma can rise to the surface and result in volcanic activity.
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 plate collisions would most likely result in a subduction zone?
Convergent plate boundaries where an oceanic plate collides with a continental plate or another oceanic plate are most likely to result in a subduction zone. In this scenario, the denser oceanic plate is forced beneath the less dense continental plate, creating a subduction zone.
Which boundaries are likely to result in volcanic island arcs?
Volcanic island arcs are likely to result from convergent boundaries where an oceanic plate subducts beneath another oceanic plate or a continental plate. The subducted plate can melt, causing magma to rise and form a series of volcanic islands above the subduction zone.
Collision boundaries and subduction boundaries are types of what boundaries?
The older denser plate sinks under a deep ocean trench into the mantle. Some rock above the subducting plate melts and forms magma. Since the magma is less dense than the surrounding rock, it rises toward the surface. Eventually, the magma breaks through the ocean floor, making a volcanoe.
Movement of lithospheric plates allows for the formation of volcanoes?
Movement of lithospheric plates at convergent boundaries can result in the subduction of one plate beneath another. This subduction creates conditions for magma to form as the subducting plate melts. The rising magma then reaches the surface, leading to the formation of volcanoes.
What is the major type of stress at convergent plate boundaries?
Subduction, is when one plate is pushed down into the magma, by the other plate sliding over the top.
Do volcanoes occur where two tectonic plates moves apart and magma rises up to create new crust?
No. Generally volcanoes occur at plate boundaries called subduction boundaries. At a subduction boundary one tectonic plate rides over another and the lower plate is forced down and magma is forced up
What happens along a plate boundary that leads to high occurrences of volcanoes?
Subduction happens along plate boundaries which pushes up magma which then creates volcanoes.
What geologic regions produces the greatest volume of magma?
Subduction zones, where one tectonic plate slides beneath another, tend to produce the greatest volume of magma. The intense heat and pressure created during this process can cause melting of the subducted plate, leading to significant magma production. This magma can rise to the surface and result in volcanic activity.
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 plate collisions would most likely result in a subduction zone?
Convergent plate boundaries where an oceanic plate collides with a continental plate or another oceanic plate are most likely to result in a subduction zone. In this scenario, the denser oceanic plate is forced beneath the less dense continental plate, creating a subduction zone.
Plate margins that are coming together are called what?
Convergent plate boundaries
Is subduction characteristic of diverging plate boundaries?
No, subduction is not characteristic of diverging plate boundaries. Subduction occurs at converging plate boundaries where one tectonic plate is forced beneath another plate. Diverging plate boundaries are where tectonic plates move away from each other, such as at mid-ocean ridges.
If One seafloor plate slides under another seafloor plate and begins to melt back into magma the name of this process is?
The process is called subduction. This occurs at convergent plate boundaries, where one of the plates is forced beneath the other due to differences in density. The melting of the subducted plate creates magma that can eventually lead to volcanic activity.
