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Geological mapping and geochomical survey to the south
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Aizawl alignment amphibolite Andaman anomaly apatite ARUNACHAL PRADESH Assam bands bank basin bed rock belt Bihar biotite block boreholes Brahmaputra carbonatite chert chromite clay Code conglomerate deposits depth district drilling Eastern Engineering Geology erosion exposed ﬁeld season ﬁne grained ﬁrst ﬂood ﬂow folds foliation Formation geochemical geological mapping geophysical geotechnical investigation gneiss gold granite gneiss grey Group of rocks GSI Rec identiﬁed indicated Irrigation limestone lithounits located manganese Manipur Meghalaya mineral Mizoram nala occur Orissa OVERVIEW phyllite Project proposed Purulia quartz quartz veins quartzite Quaternary regional river samples sandstone scale schist sector sedimentary sediments sequence shale Shear Zone Shillong silt siltstone Singhbhum Singhbhum granite slope soil spillway sq km stage geotechnical investigation structures sulphides surface Survey of India thick tion toposheet traverses trending tunnel ultramaﬁc upto volcanics West Bengal