Question

Why Igneous rocks are known as primary rocks?

Answer 1

Igneous rocks  rocks are referred to as the primary rocks, because they represent the rocks which directly or indirectly provided materials for the formation of other types of rocks.

Magma erupts from volcanic eruptions and on reaching earths crust it is called lava and solidifies by cooling.Thus, cooling and solidification are the two distinct processes involved in the formation of igneous rocks.

In rock cycle the first rock that is formed is igneous rocks from them sedimentary rocks are formed and after that metamorphic rocks formed.

Answer 2

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Igneous rocks are known as primary rocks because they are the beginners of Rock Cycle.

Igneous Rocks are rich with origin of Volcano.


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