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CENTRAL HEADQUARTERS 1 79
AIRBORNE MINERAL SURVEY AND EXPLORATION WING 80 104
COAL WING 105 174
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analysis anomaly associated bands base basin belt Bengal Bihar block bodies boreholes carried central channel clay coal Code collected complex construction cores covered deposits depth detailed developed district Division drilling east Eastern Engineering exploration exposed extension fault field fold Formation foundation geological mapping geophysical geotechnical investigation gneiss grade grained granite grey Group hill horizon identified India indicate irrigation length lignite limestone located lower magnetic major measures mica mineralisation minerals nature objective observed occur Orissa pegmatite places Pleistocene present proposed quartz quartzite range recorded regional Related represented river rocks samples sand sandstone scale Scheme schist seams sediments shale shear Singhbhum slope Special spillway sq km stage strike structure suggested surface Survey taken thickness traverses trending units Upper values varies veins Wing zone