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Why does magma rise and erupt through cracks in the mid-ocean ridge?
Wiki User
∙ 12y ago
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.
Wiki User
∙ 12y ago
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Does Magma push towards the Earth's surface through cracks?
Magma can use cracks that are already there on it way to the surface. If there are no cracks present, the magma can create them.
Why does magma flow through upward through the crust?
Liquid magma flows upward through cracks in rock because it is less dense than the surrounding material
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 forms when magma is released through long open cracks?
lava
Were does magma often move upward though in the crust?
Through cracks.
Does Magma push towards the Earth's surface through cracks?
Magma can use cracks that are already there on it way to the surface. If there are no cracks present, the magma can create them.
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
Why does magma flow through upward through the crust?
Liquid magma flows upward through cracks in rock because it is less dense than the surrounding material
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 forms when magma is released through long open cracks?
lava
Were does magma often move upward though in the crust?
Through cracks.
What is the term for the flow of magma through cracks in the earth's surface?
the flow of magma in eath's crust is called lava.
What is the effect of magma pushing up through cracks in the ocean floor?
push and a pull
How does magma rise to the surface of the Earth?
Through cracks, holes or vents in the earths crust.
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.
Why do valcanoes erupt?
A volcano is formed by pressure building up below the Earth's crust. Magma forces it way through weaknesses in the earth's crust. When the magma emerges it is called lava. When it cools, it solidifies into rock,or it may emerge though thin cracks,which are called fissure.Or it may be forced though wider pipes,that starts to build up, to a volcano.
How are geysers like volcanoes?
Their source of energy and heat is gotten from molten magma by geothermal reactions. And they both erupt, under increased temperature and pressure through vents, holes, cracks or any other form of outlet or passage into the earth surface.
