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ENGINEERING GEOLOGY AND GROUNDWATER SECTION
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appears Assistant associated B.Sc bands beds Bihar borehole carried cent Circle clay coal collected consist containing continued covered deposits depth detailed district drilling East Economic examined Exploration exposed feet field flow formations fossils Geol Geological Geological Survey Geologist gneiss gold grains granite gravel Groundwater Headquarters Calcutta hills included India indicated industry joints lignite limestone located lode Lower M.Sc Madras mapping massive material miles minerals mining Nagpur nala noted observed occur officers places portion present probably Proc quartz quartzites range recorded region reported river rocks samples sand sandstone scale seen shales Shri side soil spore stage structure suggested surface Survey of India thickness thin trap types Upper Valley varying veins village Vindhyan western zone