The Damuda Series
The Damuda series belongs to the Middle Gondwana Period which contains enormous deposits of coal seams.The coal seams are thicker and more elongated in the eastern coal fields than in the west. The important coal bearing areas of this period are Raniganj, J h ar ai a, Karanpura and Bokaro of the Damodar basin, Singrauli, Korba, and Punch valley in Chhattigarh and Madhya Pradesh, Talcher in Mahanadi Basin in Odisha, and Singareni of Satpura Basin in Madhya Pradesh. The Jhingurda Coal Seam with a thickness of about 131 metres is the thickest coal seam in India. The Gondwana rocks are also found in Himalayas from Kashmir to Arunachal Pradesh and Poorvanchal. The coal seams of these areas are metamorphosed. They are also found in Saurashtra, Kachchh, western Rajasthan, Coromandal Coast, and Rajmahal Hills (Fig. 1.5).
