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Question
Name the two rock series of two main geological ages in which coal occurs.
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Solution
In
India, coal occurs in rock series of two main geological ages. The Gondwana
coal was formed over 200 million years ago. The tertiary deposits are about 55
million years old. The major sources of Gondwana coal are located in the
Damodar valley (West Bengal-Jharkhan). In this belt, Jharia, Raniganj and
Bokaro are important coalfields. Coal deposits are also present in the
Godavari, Mahanadi, Son and Wardha valleys. Tertiary coal is found in the
north-eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.
In India, coal occurs in rock series of two main geological ages. The Gondwana coal was formed over 200 million years ago. The tertiary deposits are about 55 million years old. The major sources of Gondwana coal are located in the Damodar valley (West Bengal-Jharkhan). In this belt, Jharia, Raniganj and Bokaro are important coalfields. Coal deposits are also present in the Godavari, Mahanadi, Son and Wardha valleys. Tertiary coal is found in the north-eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.
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