0
In a subduction zone, excess magma generated from the melting of the subducting plate and surrounding mantle material typically rises to form volcanic arcs. This magma can lead to the creation of volcanoes as it accumulates in magma chambers beneath the Earth's surface. Eventually, some of this magma erupts, contributing to volcanic activity, while the remainder may solidify underground, forming intrusive igneous rocks. Over time, continuous subduction can lead to the growth of mountain ranges and the formation of new landmasses.
What else can I help you with?
What happens when an oceanic plate moves under a continental plate?
When an oceanic plate moves under a continental plate, a subduction zone is formed. The oceanic plate is forced down into the mantle, where it melts and creates magma. This magma can then rise to the surface, causing volcanic activity on the continental plate.
What is opposite of a subduction zone?
The opposite of a subduction zone is a divergent boundary, where tectonic plates move away from each other. This leads to the formation of new crust as magma rises from the mantle to fill the gap created by the plates moving apart.
What happens to the excess magma?
Excess magma that does not reach the surface during a volcanic eruption can accumulate in underground reservoirs, forming magma chambers. Over time, this magma can cool and crystallize into igneous rock, contributing to the formation of the Earth's crust. In some cases, the pressure may build up enough to cause future eruptions, while other times, it may remain dormant for extended periods. Additionally, some excess magma can be expelled through smaller fissures or volcanic vents, leading to the creation of new geological features.
Explain the relationship between trenches and seafloor spreading?
1. New sea-floor is created by the upwelling of magma at mid-ocean spreading centers; old ocean floor is destroyed by subduction at deep sea trenches. 2. The area is a subduction zone. Magma from underground comes up and destroys that crust. That crust is then recycled and the magma cools and hardens. That creates new land, that creates the trenches. Seafloor spreading is in the ocean and happens with convection currents. That is the relationship between. 3. As new seafloor is formed at mid-ocean ridges, the old seafloor is pushed down into trenches at subduction zones.
During Subduction does the mantle melt?
Yes, during subduction, the mantle can melt. As an oceanic plate descends into the mantle, it carries water and other volatiles, which lower the melting point of the surrounding mantle rocks. This process can lead to the formation of magma, contributing to volcanic activity at subduction zones. The resulting magma can rise to the surface, forming volcanic arcs.
How is magma created in a subduction zone?
Magma is created in a subduction zone when one tectonic plate is forced beneath another plate. The intense pressure and heat cause the subducted plate to melt, forming magma that rises to the surface and can lead to volcanic activity.
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 happens after magma erupts along mid ocean?
The magma spills over the ridge and pushes the old sea floor away toward a subduction zone where the old sea floor melts.
What happens during subduction important to rock cycle?
During subduction, one tectonic plate moves beneath another into the mantle. This process can cause melting of the descending plate, leading to the formation of magma. This magma can then rise to the surface through volcanic activity, contributing to the formation of new igneous rocks and completing the rock cycle.
What happens when an oceanic plate moves under a continental plate?
When an oceanic plate moves under a continental plate, a subduction zone is formed. The oceanic plate is forced down into the mantle, where it melts and creates magma. This magma can then rise to the surface, causing volcanic activity on the continental plate.
How is magma generated along subduction zones?
Magma is generated along subduction zones when oceanic plates are forced beneath continental plates. The intense heat and pressure cause the oceanic plate to melt, creating magma that rises to the surface and forms volcanoes.
What happens to magma after it erupts onto the ocean floor?
The magma spills over the ridge and pushes the old sea floor away toward a subduction zone where the old sea floor melts.
What is opposite of a subduction zone?
The opposite of a subduction zone is a divergent boundary, where tectonic plates move away from each other. This leads to the formation of new crust as magma rises from the mantle to fill the gap created by the plates moving apart.
What happens after magma cools?
It turns into rock. Islands can be created by the newly formed rock.
What happens to the excess magma?
Excess magma that does not reach the surface during a volcanic eruption can accumulate in underground reservoirs, forming magma chambers. Over time, this magma can cool and crystallize into igneous rock, contributing to the formation of the Earth's crust. In some cases, the pressure may build up enough to cause future eruptions, while other times, it may remain dormant for extended periods. Additionally, some excess magma can be expelled through smaller fissures or volcanic vents, leading to the creation of new geological features.
Explain the relationship between trenches and seafloor spreading?
1. New sea-floor is created by the upwelling of magma at mid-ocean spreading centers; old ocean floor is destroyed by subduction at deep sea trenches. 2. The area is a subduction zone. Magma from underground comes up and destroys that crust. That crust is then recycled and the magma cools and hardens. That creates new land, that creates the trenches. Seafloor spreading is in the ocean and happens with convection currents. That is the relationship between. 3. As new seafloor is formed at mid-ocean ridges, the old seafloor is pushed down into trenches at subduction zones.
How was Mt St Helens created?
Mount St. Helens was created due to the subduction of the Juan de Fuca plate below the North American plate. This subduction caused partial melting of material in the mantle which formed magma. This magma was more buoyant than the surrounding material so migrated towards Earth's surface, resulting in the formation of volcanoes in the Cascades mountain range, including Mt. St. Helens.
