Question

Why are igneous rocks considered as primary rocks?

Answer 1

Instructions:

• Definition of igneous rocks
• Formation of igneous rocks

Solution:

• Igneous rock is formed by the cooling and solidification of molten Earth materials.
• For example we have basalt and granite.
• Igneous rocks are formed directly from the molten lava, so it does not depend on any other rock for its formation.
• And also, the igneous rock acts as a source rock for the other two either directly or indirectly.
• Because of this very reason the igneous rocks are also called primary rocks or parent rocks.