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Magma is more buoyant than lithospheric rock, and as such it will push toward the surface. On the continents, magma in intrusions can follow weaknesses in the crustal rock to reach the surface, or in some cases, simply melt its way through from the heat delivered by the intrusion. At divergent plate boundaries, where the lithospheric plates are pulling apart, hot rock from the mantle rises and melts from decompression melting, filling the space left from the parting plates. At so-called hotspots, such as the Hawaiian volcanic mountain chain, magma plumes are thought to rise up from the mantle-core boundary and burn through the moving lithospheric plates, creating first submarine volcanoes, then islands.
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Most magma forms in?
the Earth's mantle. As temperatures increase with depth, rocks partially melt to form magma. This magma can rise towards the surface through volcanic activity.
Magma tends to rise toward earths surface?
Yes, magma tends to rise towards the earth's surface. It does so because once melted it becomes less dense.
What rock that melts underneath earth?
The rock that melts underneath the Earth is called magma. Magma is formed from the melting of the Earth's mantle and can rise to the surface to form igneous rocks when it solidifies.
What name is given to molten underground?
Magma is the name given to molten underground rock. It can be found beneath the Earth's surface in the mantle and can eventually rise to the surface through volcanic activity.
What is source material for andesitic magma?
Andesitic magma is typically sourced from the partial melting of subducted oceanic crust and overlying mantle at convergent plate boundaries. This process results in the formation of a magma with intermediate silica content, giving rise to andesitic volcanic rocks.
How does the magma rise from the volcano?
magma rises up out of a volcano by the build up of pressure
Does liquid magma rise until reaches the surface?
liquid magma is dangerous and tastes bad
How does andesitic rise to the surface?
magma rises and cools
Why does magma come to the surface?
Magma is less dense than the surrounding rock; as such, it will rise toward the surface.
What makes the magma im the chamber rise?
Because of the asthenosphere.
Does liquid magma rise until it reaches the surface?
yes. it goes upward through a 'pipe' that connects to the magma chamber.
Why does magma in a volcano rise up to Earth's surface?
Magma rises because it is less dense than the rock around it.
Why does magma from deep inside Earth rise toward the surface?
cuz
Most magma forms in?
the Earth's mantle. As temperatures increase with depth, rocks partially melt to form magma. This magma can rise towards the surface through volcanic activity.
When will magma rise to earths surface?
During a volcanic eruption or on a constructive boundary
What kind of mountain is formed when magma rise to the surface and erupts?
Volcanic mountains
Does heated magma rise or sink?
When magma is being heated it rises. When it is cooled, it sinks.
