Question

Give reasons for the following:

Igneous rocks are also called Primary Rocks or Mother Rocks.

Answer 1

Igneous rocks are called ‘primary rocks’ or ‘mother rocks’ because they were the first to be formed on the Earth by the cooling and solidification of molten magma. All other types of rock, sedimentary and metamorphic, are derived from them through various processes, making igneous rocks the original or ‘parent’ material for other rock types.