Characteristics of igneous rocks

♤ They are compact and massive and do not possess rounded particles.

♤ They do not occur in distinct beds or stratas.

♤ They are generally granular and crystalline.

♤ They are hard and impermeable.

♤ They are less affected by chemical weathering.

♤ They do not contain any fossils or traces of animals or plants.

♤ Most of the igneous rocks consist of silicate minerals.

♤ The valuable minerals such as iron, gold, silver, aluminium, etc., are found in them.