Question

Why are igneous rocks called as primary rocks?

Answer 1

Answer:

Igneous rocks are known as primary rocks as they are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

All other rocks are derived from them, so they are also called as parent rock.

Answer 2

Answer:

Igneous rocks are often called primary rocks because they are at the start of the rock cycle. Their parent material is not sediment or fragments of...