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To do this, 2 continental plates, 2 ocienic plates, or 1 of each must collide together. That's how the Himalayas were made. Or there might be a tunnel of magma trying to breach the surface of the Earth.

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7y ago
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13y ago

The magma/lava can create tremendous pressure under the crust. This can cause the crust to bulge. If relieved, though an eruption, often the bulge collapses, resulting in a caldera.

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13y ago

The pressure inside the earth builds and builds. There are no vents or fissures for it to come out so it just explodes or bulges into the earths suface.

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9y ago

Magma and lava create bulges in the Earth's surface through the plutons that rise from a plate subduction zone. These plutons are made up of molten rock, which is primarily magma.

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12y ago

basically, the lava cant find a fissure to exploit hence the lava is just building up causing a bulge eventually it'll pop.

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13y ago

Upward movement of magma

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Q: How do bulge form in a volcano?
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Related questions

How do form?

A cryptodome forms when very viscous magma (underground molten rock) moves to a location near the surface, often inside a volcano, and essentially inflates the ground, forming a bulge.


What may be indicated by bulge in the side of a volcano?

Magma is rising towards the surface prior to an eruption.


What might cause a bulge in the slope of a volcano?

the magma growing in size and large cracks forming


Why did the volcano kohala form?

How did the volcano kohala form


How do cryptodomes form?

A cryptodome forms when very viscous magma (underground molten rock) moves to a location near the surface, often inside a volcano, and essentially inflates the ground, forming a bulge.


Why would detecting a bulge in a volcano be a sign of a coming eruption?

It means the pressure is increasing behind the plug.


How do you use the word bulge in a sentence?

Gee, I hope this tight shirt hides my bulge.Is a bugle with a bulge actually a saxophone?"The caldera has a fresh bulge today", shouted the rider as he spurred his horse faster down the volcano's trail.


How does a volcanic laccolith form?

A volcanic laccolith is a mass of igneous rock that is associated with a volcano. It is formed from magma that did not make it to the surface, but that spread out laterally. It forms a bulge in the land around the volcano.


How are b volcano form?

WHat is a volcano


What can form when a volcano reaches the surface?

Mountains form when the volcano reaches the surface


Why do new stars form in the arms of a spiral galaxy and not in the central bulge?

Stars form in all parts of our galaxy - not just the "arms". Stars do indeed form in the central bulge. The vast majority of hot, young, blue stars are formed in the arms, but stars also form in the central bulge as well.


Where does the water form a bulge?

Rivers,Streams,and ponds