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Geological map of Raniganj coalfield
Geological map of Jharia coalfield
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analyses anthracitic Assam Barakar Barakar measures beds beneath caking carbon cent Central century coal industry coal measures coal seams coal-bearing coalfield coking colliery considerable consumption contain continue countries crop Damodar deposits developed domestic east eastern economic Eocene extent faults feet thick field fixed formed fuel further Geological Giridih given Gondwana higher hills important increased India indicates industry iron Italy Jharia least less lignite limestones limited lower mainly manufacturing matter million tons mineral mines moisture nature northern occur outcrops output percentage period places plants present principal probably production proved province Punjab railway Range Raniganj recent Regarding relatively reported reserves result river sandstones scale separately sequence shales southern square miles stage steam strata TABLE taken Tertiary thin tion trade types upper valley varies various volatile western workable World