Consider the following rocks:

  1. Pumice
  2. Basalt
  3. Granite

  Which of the above is/are extrusive igneous rock(s)?

Answer: [C] 1 & 2 Only

Granite is an intrusive igneous rock. Pumice and Basalt are extrusive igneous rocks. Igneous rocks are formed from cooling and solidification of magma. If the magma cools below the surface of earth’s surface, it is called intrusive igneous rock. If the magma cools above the surface of earth, it is called extrusive igneous rock.

This question is a part of GKToday's Integrated IAS General Studies Module