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Magma rises through fractures from beneath the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. As more magma rises up below it, the pressure in the chamber grows.

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How is the lava formed insind a volcano?

When an oceanic plate and a continental plate collide, it forms a volcano. The oceanic plate subducts underneath the continental plate. As the oceanic plate slides underneath, a magma chamber is formed. This magma chamber is what feeds the volcano.


Where is the magma in a volcano?

In a magma chamber


What is magma called after it has erupted?

It's called lava. Magma is formed in the magma chamber, then later when the volcano erupts, it turns to lava.


What is the cavity where magma is stored under a volcano called?

This is called the magma chamber.


What molten rock collects in a chamber beneath a volcano?

Magma collects in a chamber beneath a volcano.


Mass rock formed when a volcano's magma chamber empties and collapses?

A mass rock is formed when a volcano's magma chamber empties and the overlying rock collapses into the empty chamber. This creates a steep-walled depression or caldera at the volcano's summit. It is a common feature of collapsed volcanoes.


Is a caldera another name for a magma chamber?

No. A magma chamber is the area under a volcano where molten rock is stored. A caldera is a depression in the ground formed during an exceptionally violent volcanic eruption. A caldera forms when a volcano drains a large volume of magma from the magma chamber, causing the volcano to collapse into the space left behind.


What is the definition of a volcano magma chamber?

A volcano magma chamber is a large underground reservoir that holds molten rock (magma). It is a key component of a volcano's plumbing system and acts as a storage unit for magma before it is eventually erupted to the surface. The magma chamber is typically located beneath the volcano and can vary in size and shape.


Where is magma collected below a volcano?

a magma chamber


Where are big crystals are made in volcano?

the magma chamber and then they erupted onto the surface, where the small crystals were formed.


What happens when there isn't any magma in the magma chamber of a volcano?

the volcano becomes extinct


What is formed when the top of a volcano collapses into a partially emptied magma chamber?

what happens is that it forms a caldera