Why Magma Comes out?
The Fluid Flows up into the Mantle Rock Above and Changes Its Chemistry, Causing It to Melt. This Forms Magma (Molten Rock). .. . as Magma Fills the Chamber...
The fluid flows up into the mantle rock above and changes its chemistry, causing it to melt. This forms magma (molten rock). ... As magma fills the chamber, pressure grows. If the pressure gets high enough, the magma can break through the crust and spew out in a volcanic eruption.
Why does magma come out of a volcano?
Magma forms from partial melting of mantle rocks. As the rocks move upward (or have water added to them), they start to melt a little bit. ... Eventually the pressure from these bubbles is stronger than the surrounding solid rock and this surrounding rock fractures, allowing the magma to get to the surface.
Why does magma eject from the earth?
As a result of its higher viscosity and gas content, intermediate magma builds up pressure below the Earth's surface before it can be released as lava. ... These eruptions eject lava violently into the air, which cools into dacite and rhyolite rock.
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