Describe the distribution of coal in India

In India, coal can be found in rock series of two main geological ages:

1. Gondwana (200 million years old)
2. Tertiary deposits (55 million years old)

The major resources of Gondwana coal are located in:

1. Damodar Valley (West Bengal – Jharkhand) – Jharia, Raniganj and Bokaro are important coalfields.
2. Godavari valley
3. Mahanadi valley
4. Son valley
5. Wardha valley

Tertiary coal occurs in the northeastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.