Question

why are the igneous rocks also known as primary roks​

Answer 1

Answer:

Igneous rocks are created from the cooling of molten magma/lava. All other rocks are derived from them. Because they form the basis of formation of other types of rocks, igneous rocks are known as the primary rocks

Answer 2

Answer:

Rocks which are formed by solidification of magma are known as primary rocks. Igneous rocks are considered as the primary rocks as these are the rocks which form from the material that comes from below the earth. Igneous rocks are one of the three basic rock types. Other two are sedimentary and metamorphic. They represent the rocks which directly or indirectly provided materials for the formation of other types of rocks.