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Geological Survey of India
FIELD SEASON 199192
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amphibolite anomaly associated axis bands bank Based basic belt Bihar biotite block body boreholes carried channel charnockite clay Code collected complex comprising construction continued covered deposits depth detailed developed DISTRICT drilling dykes east eastern exploration exposed extension fault field flood folds foliation Formation foundation GEOLOGICAL MAP Geology Division geophysical geotechnical gneiss gold granite grey Group hill INDEX indicated intrusives joints length limestone located major material mineral mineralisation minor noticed observed occur Orissa pink places present proposed quartz veins quartzite ranging regional represented river road rock samples sandstone scale schist schist belt season sediments seen sericite shale shear zone slope soil spillway sq km stage strike structures studies suggested sulphide surface surveys thick traverse trench trending tunnel types units upto valley values varies volcanics weathered western width