How does volcano formed ?

Question

Leo Arens · Accepted Answer

There are different kinds of volcanoes, classified according to what kind of magma they have, and the shape and size of the cones they make.

Here's a summary - as brief as I can make it:

The two kinds of magma are felsic, and mafic.

Mafic lava is made of basalt and it flows.
Felsic lava is thicker and is explosive.
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(1) Shield Volcanoes have mafic magma that oozes out of their craters, forming volcanoes like Kilauwea and other Hawai'ian volcanoes.

These volcanoes are the largest.

This photo was taken from far away because this volcano is so big:

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(3) Cinder Cone Volcanoes have a cone made of pyroclastic material or tephra - lava that is hurled into the air, hardening in pieces, building up the sides of the cone.

These are the smallest volcanoes, and they usually erupt just once.

Leo Arens · Answer

See below.

"Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface" (https://tutor.hix.ai). The magma, once it reaches the surface, cools and deposits as a solid. Over time, the magma's solid deposits build up, and eventually, a volcano is formed. I hope that helps!

Audrey Adams · Answer

undefined Volcanoes are formed when magma from within the Earth's mantle rises to the surface. This can occur through a process called volcanic activity, which is often associated with tectonic plate boundaries or hotspots. As the magma rises, it may erupt onto the surface, forming a volcano. Over time, repeated eruptions can build up layers of lava, ash, and other volcanic materials, shaping the characteristic cone or mountain of a volcano.