Question

Classify coal deposits on the basis of geological ages

Answer 1

In India Coal occurs in rock series of two main geographical ages, namely gondwana, a little over 200 million years in age and in tertiary deposits which are only about 55 million years old.

The major resources of Gondwana coal, which are metallurgical coal, are located inDamodar valley (West Bengal-Jharkhand). Jharia, Raniganj, Bokaro are important coalfields.

The Godavari, Mahanadi, Son and Wardha valleys also contain coal deposits.

Tertiary coals occur in the north eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.

Answer 2

The coal deposits on the basis of their age can be classified as Gondwana coal which is approximately 105 million years old and tertiary coal which is just approximately 88 million years old