Records of the Geological Survey of India, Volume 104The Survey, 1972 - Earthquakes Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 108
... hard and sound and do not show any altera- tion of the minerals . The constituent minerals are plagioclase felspar and augite and exhibit an ophitic to sub - ophitic texture . Gabbro - diorites available near the dam site is also ...
... hard and sound and do not show any altera- tion of the minerals . The constituent minerals are plagioclase felspar and augite and exhibit an ophitic to sub - ophitic texture . Gabbro - diorites available near the dam site is also ...
Page 142
... hard rocks , although wells as deep as 150 metres have been attempted in some areas . Experience has shown that below a depth of about 70 metres of ground level , the yield of wells is not significantly augmented . Drilling machines of ...
... hard rocks , although wells as deep as 150 metres have been attempted in some areas . Experience has shown that below a depth of about 70 metres of ground level , the yield of wells is not significantly augmented . Drilling machines of ...
Page 158
... Hard Rocks The regime of groundwater in hard rocks is strikingly different from that of unconsolidated and semi - consolidated sediments . Hard rocks possess secondary porosity which are generally of two types : firstly joints ...
... Hard Rocks The regime of groundwater in hard rocks is strikingly different from that of unconsolidated and semi - consolidated sediments . Hard rocks possess secondary porosity which are generally of two types : firstly joints ...
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Common terms and phrases
abutment alignment alluvial alluvium amphibolite Andhra Pradesh aquifers Assam bands basalt basin bauxite Bihar block boreholes carried chalcopyrite charnockite clay Coalfield construction Dam Project Deccan Trap deposits depth dips district Division dolerite dolomite drill holes dykes earth dam Engineering Geology excavation exploration fault folded foliation Formation foundation geochemical geohydrological Geol geological mapping Geological Survey Geologists Jr Geophysical Ghosh gneiss Gondwana grade granite gneiss graphite groundwater grouting Gujarat hard rock Hydel Project indicated investigation irrigation joints Laboratory laterite limestone located logging Madhya Pradesh metres million tonnes mineralisation minerals Mysore occur Orissa pegmatite phosphorite phyllites power house pyrite quartz veins quartzite Rajasthan Region reservoir rock types S/Shri samples sand sandstone scale schist seams sediments shales shear zones Shri Singh Siwaliks spillway strike length structure studies Survey of India taluk thick tion trending tubewells tunnel Udaipur district upto Uttar Pradesh valley varies Vindhyan weathered West Bengal