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Graphs showing the Burma British Empire and World production
NOTES ON TUNOSTEN
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analyses Assam average Barakar bismuth Burma caking carried cent Central chaung coal measures coal seams Coalfields coking colliery Company concentrates consumption contain continued countries cutting deposits district east eastern Eocene export feet feet thick field fuel further Geological Giridih given Gondwana granite hills important increased India industry Jharia latter less lies lignite limestones limited lodes lower Mergui metal miles mineral mines mixed moisture obtained occur output percentage period places present production properties proved quartz railway Range Raniganj recent Regarding reported reserves result river road rocks Sandstones and shales separation showing sluicing southern stage steel strata strike Survey TABLE Tavoy Tertiary thickness thin tin and wolfram tin concentrates tion trade tungsten unit Upper valley varies various veins whilst wide wolfram workable World