National employment guarantee scheme provide unemployment for how many number much days
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Gondwana coal fields
i). These mines are the main producers of coal in India.
ii). These are more than 200 million years old.
iii). These produce good quality of coal.
iv). Gondwana coal occurs in Damodar valley, the Godavari, Mahanadi, Son and the Wardha valley.
Teritary Coal fields
i). These are the minor producers of coal in India.
ii). These are only 55 million years old.
iii). These produce a poor quality of coal.
iv). Teritary coal occurs in the north eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.
i). These mines are the main producers of coal in India.
ii). These are more than 200 million years old.
iii). These produce good quality of coal.
iv). Gondwana coal occurs in Damodar valley, the Godavari, Mahanadi, Son and the Wardha valley.
Teritary Coal fields
i). These are the minor producers of coal in India.
ii). These are only 55 million years old.
iii). These produce a poor quality of coal.
iv). Teritary coal occurs in the north eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.
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