Question

which process is necessary for the formation of igneous rock​

Answer 1

Explanation:

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there

Answer 2

The Answer is:

When molten, heated rock crystallises and hardens, igneous rocks are created. The melt begins deep inside the Earth around hot regions or active plate borders, then it moves forward towards the surface.

• The composition of igneous rocks can differ based just on magma they settle from. Depending on their cooling circumstances, they may also have a varied appearance.
• Extrusive and intrusive igneous rocks are the two primary subcategories. Lava, which itself is magma which has surfaced from beneath the Earth, is what gives rise to extrusive rocks. Magma cools and solidifies inside the planet's crust, forming intrusive rocks.
• Extrusive igneous rock, sometimes referred to as volcanic rock, is created when lava erupts from a volcano and hardens. Small crystals form quickly within solid volcanic rocks since it do not have that much time to grow before the rock completely cools, which halts crystal growth.
• Rocks that are intrusive, also known as plutonic rocks, cool gradually below the surface.
• They have sizable crystals that can typically be seen without the need of a microscope. The texture of this surface is phaneritic.
• Granite is arguably the most well-known phaneritic rock.
• Pegmatite is an extreme kind of phaneritic rock.

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