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There are two known processes by which magma ceases to exist: by volcanic eruption, or by crystallization within the crust or mantle to form a pluton. In both cases the bulk of the magma eventually cools and forms igneous rocks.

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10y ago
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9y ago

Magma is molten rock that is just under the surface of the Earth. When magma cools under the surface, it crystallizes and turns into plutonic rock.

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11y ago

When magma cools below the earths surface it forms intrusive igneous rock.

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Q: What is magma and what happens when it cools down underground?
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What is covection?

It happens in the mantle. The middle layer of the Earth. The mantle's fluid or magma rises from the Earth's core. It becomes less dense. It travels away from the core cause of the tremendous heat and pressure. Once it cools off it cones back down. When it starts to heat back up again then it rises back up. It goes in a circular motion. That's convection current.


What is a magmatic quake?

A magmatic quake is seismic activity caused by the movement of high pressure magma within the earth's crust. This tends to occur as the pressure within a magma chamber increases which leads to hydraulic fracturing of the surrounding rock mass. This fracturing causes the seismicity or magmatic quake. This sort of small scale seismic activity near a volcano may indicate that the pressure in the magma chamber that feeds the volcano is increasing and in turn may be a precursor to a volcanic eruption and is something that vulcanologists or geophysicists would be on the look out for!


What is the result of rock's poor ability to transmit heat?

cools down slowly


How is ignite rock formed?

Rock Song (Tune to Row-row your boat)Sedimentary rocks have been formed in layersoften found near water sources,fossils and decayersThen theres igneous rockhere since earth was bornmolten lava cooled and hardedmetamorphic will be formed


Why does hot water cool quicker in the first 5 minutes?

This is because of newtons law of cooling, the rate that the water cools is proportional to the difference between the temperature of the water and the temperature of the surroundings. So, as the water is hotter it cools faster, as it cools down the rate of cooling decreases.

Related questions

Extrusive igneous rocks form when hardens and cools.?

It happens when lava is on the outside the cools down to form EXtrusive rock.


Is lava magma when it cools down?

No. Lava is magma that has reached the surface.


How is ignius rock formed?

it is formed either underground or above ground. it is formed underground when hot magma is trapped and cools slowly, when it has cooled down it has then become igneous rock but on top of the ground the lava cools much quicker then what it does below the ground


How does magma turn to rock?

It cools down.


What happens during a volcano and how does it change the surface of the earth?

It releases magma and starts melting/burning the earth until it cools down.


When magma cools down it is called?

Solidified magma underground is referred to as intrusive igneous rock.


Can landforms be made of magma?

Yes magma cools down and forms a harder rock.


What breaks down igneous into sediments?

magma cools and solidifies.


How does magma make a rock?

Magma makes a rock when it cools down and hardens. Hope i helped


What is geothermal activity?

Geothermal activity is activity which happens deep down underground in the Earth. It can be like the magma rising when a volcano is erupting or about to erupt.


How do rocks get their shape?

There is no shape for an rock they just form by them selves when magma cools down.


Lava is magma that has reached the what in an eruption?

Lava is magma that has reached the surface of the earth in an eruption. When this cools down, it will form igneous rocks.