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Which of the Earth's layers does the magma come?
Magma is fluid molten rock that exists under the Earth's crust.
Where does magma originate?
Magma originates from the Earth's mantle, which is a layer of hot, semi-solid rock located beneath the Earth's crust. It forms when rocks in the mantle melt due to high temperatures and pressure. Magma can then rise to the Earth's surface through volcanic activity, such as volcanic eruptions.
Magma sometimes approaches or escapes onto Earth's surface Where does this magma form?
Magma typically forms in the Earth's mantle, which is a layer beneath the crust. It forms as a result of the melting of rocks due to high temperature and pressure within the mantle. This molten rock can then rise to the surface through volcanic activity.
Is magma released from volcanoes material from the core?
No, it's material from the mantle that is forced up due to partial melting of the subducting crust. As it forces its way up, it collects rock from the crust it is passing through and so the result is a mix of the crust and the mantle.
Why does oceanic crust melt?
At mid-ocean ridges, such as the Atlantic Rise and Pacific Rise. As two plates move apart the crust is stretched and thinned, causing less pressure on the mantle immediately below. Due to this drop in pressure the mantle undergoes "decompressional melting" allowing magma to form. This magma is less dense than the surrounding mantle and rises at the mid-ocean ridges, cooling and forming new oceanic crust.
What has to happen before rock from the earth's mantle become a new piece of crust?
It has to harden
Which part of the Earth is the source of magma?
Lava is magma that reaches the surface. Magma originates either from rising plumes of heat at hot spots in the Earth's mantle, where decompression melting takes place as the hot rock nears the surface; or, it originates in the mantle from subduction of oceanic crust, where cold, wet rock speeds melting of the subducting rock and it rises toward the surface.
Why does magma in the mantle rise through the crust above it?
magma comes from the outer core and when an earthquake or something happends, a crack froms and the pressure of lava shoots up like a geyser.
What is a stationary pocket of magma in earth's mantle that is less dense than the surrounding area and rises towards the surface?
A stationary pocket of magma in the Earth's mantle that is less dense than the surrounding material is called a "mantle plume." These plumes rise toward the surface due to their buoyancy, often leading to volcanic activity when they reach the crust. Mantle plumes can be responsible for hotspot volcanism, such as the formation of the Hawaiian Islands.
What is the opening in the earth's crust that allows magma to reach the surface?
An opening in the Earth's crust that allows magma to reach the surface is called a volcano. Volcanoes can be found along tectonic plate boundaries where the Earth's crust is weak, allowing magma from the mantle to rise and erupt onto the surface.
Is magma molten rock formed in the asthenophere?
Yes, magma is indeed molten rock formed in the asthenosphere, which is a layer of the Earth's mantle. Due to the high temperature and pressure in the asthenosphere, rocks can partially melt to form magma. This magma can then rise through the Earth's crust and eventually reach the surface as lava during volcanic eruptions.
Does magma come from the inner core or outer core?
Magma primarily comes from the mantle, which lies between Earth's crust and the outer core. It forms as a result of the heat and pressure in the mantle causing rocks to melt and rise towards the surface through volcanic activity.
