0
At the mid-ocean ridge, two oceanic plates are moving apart. This movement creates a loss of overlying pressure at the rift. With the loss of pressure, hot ductile mantle rock rises to fill the void. As this hot rock rises, it undergoes decompression melting due to the new environment it is encountering. The now liquid rock is even more buoyant than the surrounding rock, and rises toward the surface.
What else can I help you with?
Does Magma push towards the Earth's surface through cracks?
Yes, magma pushes towards the Earth's surface through cracks in the crust, a process known as volcanic activity. When pressure builds up beneath the surface, magma can force its way through weak points in the crust, such as fractures or faults, leading to volcanic eruptions.
What is a vent called through which gas and ash and magma erupt onto the earth's surface?
A vent through which gas, ash, and magma erupt onto Earth's surface is called a volcano.
How does volcanoes from and erupt?
Volcanoes erupt when pressure from inside the earth pushes magma through a weakness in the earth's surface. As more and more magma erupts, the volcano is formed and grows.
How do plate tectonics make a volcano erupt?
When two plates collide one pushes the other one down. Then the magma goes through the gaps between the plates and then the volcano erupts. Volcanoes can also erupt by the plates spreading apart.
Were does magma often move upward though in the crust?
Magma often moves upward through the Earth's crust along cracks and fractures in the rock, known as magma conduits. These conduits can be created by tectonic activity, such as the movement of tectonic plates, which can provide pathways for magma to reach the surface and form volcanic eruptions.
Does Magma push towards the Earth's surface through cracks?
Yes, magma pushes towards the Earth's surface through cracks in the crust, a process known as volcanic activity. When pressure builds up beneath the surface, magma can force its way through weak points in the crust, such as fractures or faults, leading to volcanic eruptions.
What are the steps a volcano has to go through to erupt?
1. Pressure in the magma chamber begins to build up. 2. The pressure forces the magma to go up through the vent. 3. Then it will erupt
What is a vent called through which gas and ash and magma erupt onto the earth's surface?
A vent through which gas, ash, and magma erupt onto Earth's surface is called a volcano.
How does volcanoes from and erupt?
Volcanoes erupt when pressure from inside the earth pushes magma through a weakness in the earth's surface. As more and more magma erupts, the volcano is formed and grows.
What causes volcanic activity to occur?
Volcanic activity occurs when molten rock, called magma, rises to the surface of the Earth through cracks in the crust. This can happen due to the movement of tectonic plates, which can create pressure and heat that forces the magma to erupt as lava, ash, and gases.
How do plate tectonics make a volcano erupt?
When two plates collide one pushes the other one down. Then the magma goes through the gaps between the plates and then the volcano erupts. Volcanoes can also erupt by the plates spreading apart.
How does the silica content of earths crust under the oceans get magma?
Silica-rich magma forms in mid-ocean ridges due to partial melting of the upper mantle, as a result of increased temperature and decreased pressure. This magma rises through cracks in the oceanic crust and can eventually erupt at the surface as lava.
How does the magma get above ground?
Magma rises to the surface through volcanic conduits and pathways called dikes, fractures, and conduits. This process is driven by buoyancy and pressure from the Earth's mantle. As magma moves upward, it can eventually erupt onto the surface as lava through volcanic vents or fissures.
How does magma rise to the surface of the Earth?
Through cracks, holes or vents in the earths crust.
What is the effect of magma pushing up through cracks in the ocean floor?
push and a pull
How does magma reach the top of a volcano?
Pressure inside the earth forces the magma through cracks and other conduits in earth's crust.
Were does magma often move upward though in the crust?
Magma often moves upward through the Earth's crust along cracks and fractures in the rock, known as magma conduits. These conduits can be created by tectonic activity, such as the movement of tectonic plates, which can provide pathways for magma to reach the surface and form volcanic eruptions.
