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Why would a plume of solid silicate rock rising slowly from deep in the mantle begin melting as it near the base of the lithosphere?

Temperatures remain high as lowered pressures decrease melting temperatures.


What is responsible for the partial melting of peridotite?

In the mantle, temperatures range between 500 to 900 °C (932 to 1,652 °F) at the upper boundary with the crust; to over 4,000 °C (7,230 °F) at the boundary with the core.Although the higher temperatures far exceed the melting points of the mantle rocks at the surface (about 1200 °C for representative peridotite), the mantle is almost exclusively solid. The enormous lithostatic pressure exerted on the mantle prevents melting, because the temperature at which melting begins (the solidus) increases with pressure.


How is decompression melting triggered?

Decompression melting occurs when the pressure on hot rock is reduced, causing it to melt due to the decrease in pressure. This can happen as tectonic plates move apart, creating a reduction in pressure on the underlying mantle rocks, leading to partial melting and the formation of magma.


Where does the rock cycle begin and end?

The rock cycle can begin with the formation of magma from the melting of existing rocks in the Earth's mantle. It ends when rocks are weathered and eroded into sediment, which can then be compacted and cemented together to form new sedimentary rocks, completing the cycle.


Called of liquefying a solid by heat?

The process of turning a solid into a liquid by heating it is called melting. This occurs when the solid's particles gain enough energy to overcome their fixed positions and begin to move freely, transitioning into a liquid state.


What allows rock melting to begin at convertgent plate boundaries?

Water reducing the melting point.


What might cause solid rock in the Earth's interior to melt and begin to flow?

The mantle cause the mantle to flow.


Why would a plume of solid silicate rock rising slowly from deep in the mantle begin melting as it neared the base of the lithosphere?

The decrease in pressure as the plume nears the base of the lithosphere lowers the melting point of the rock. As the plume rises, it also encounters higher temperatures closer to the earth's surface, further promoting melting of the solid silicate rock. These factors combined lead to the melting of the rock as it reaches the base of the lithosphere.


What are three processes that begin in Earth's interior?

The Crust,The Mantle and The Core


Do hot spots begin at the boundary between the mantle and the outer core?

yes!


Which region of the earth interior does the heat increase to the point that rocks can begin to melt?

In which region of the Earth's interior does the heat increase to the point that rocks can begin to melt?


Magma forms when rocks begin to melt?

Yes. Magma is underground molten rock.