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BIHAR EAST CIRCLE
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alignment analysis anomaly associated Attended bands bank belt block boreholes carried Chemical Circle clay collected completed comprising construction continued core covered deposits depth detailed dips Director DISTRICT Division drilling east Engineer examined exploration exposed fault field folds Formation foundation Garhwal geological mapping Geologist geophysical gneiss grade granite grey Group Headquarters holes included India indicated investigation joints Laboratory length limestone located logged lower Lucknow magnetic major meeting mineral mineralisation Nagpur observed occurs officers phyllite pits power house PRADESH present proposed quartz quartzite recommended Region reported river road rock rock types S/Shri samples sandstone scale Scheme schist sediments sericite shale shear Shri soil spillway sq km stage strike structure studies suggested surface surveys thick thin tion toposheet traverse trending tunnel units Upper upto valley varying veins zone