Records of the Geological Survey of India, Volume 104

abutment alignment analysed aquifers Assistant associated bands bank base basin Bihar block boreholes carried Central Circle clay collected construction continued covered deposits depth detailed dips Director district Division drilling earth east Engineering examined exploration exposed extending fault field flows folded Formation foundation further Garhwal geological Geologists gneiss grade granite groundwater Group hard hill holes India indicated joints Laboratory length limestone located Lower major mapped material measures million mineralisation minerals Mining nature occur officers period phyllites places Pradesh presence problems Project proposed quartz quartzite Rajasthan ranges recommended Region reported reserves reservoir river rock S/Shri samples sand sandstone scale schist seams shales shear Shri strike structure studies suggested suitable surface Survey systematic tests thick tion tonnes Trap trending tunnel types units Upper valley varies veins weathered West zone