Records of the Geological Survey of India, Volume 107The Survey, 1976 - Earthquakes Includes the Annual report of the Geological Survey of India, 1867- |
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Page 192
... holes . Coarse grained mica schist and granite gneiss traversed by tourmaline and beryl bearing pegmatite , both along and across the foliation comprise the rock types at the dam site . Pegmatite containing beryl has been located by ...
... holes . Coarse grained mica schist and granite gneiss traversed by tourmaline and beryl bearing pegmatite , both along and across the foliation comprise the rock types at the dam site . Pegmatite containing beryl has been located by ...
Page 346
... holes . Subsurface explorations showed that silicified tuff which underlies a cover of 16 to 18 m of fresh dense basalt is sufficiently watertight . A drill hole for confirming the existence of an inferred fault in the tuff has been ...
... holes . Subsurface explorations showed that silicified tuff which underlies a cover of 16 to 18 m of fresh dense basalt is sufficiently watertight . A drill hole for confirming the existence of an inferred fault in the tuff has been ...
Page 347
... holes . Delineation of the bed rock profile in the burried channel by geophysical survey recommended . He also suggested undertaking excavation of the cut - off trench before raising the masonry in the river section . Thana district ...
... holes . Delineation of the bed rock profile in the burried channel by geophysical survey recommended . He also suggested undertaking excavation of the cut - off trench before raising the masonry in the river section . Thana district ...
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Common terms and phrases
amphibolite Andhra Pradesh Archaean bands basalt basin bauxite beds Bihar biotite block boreholes carried chalcopyrite chlorite clay Coalfield conglomerate copper cores Deccan Trap Delhi deposits depth Director district Division dolerite drilling epidote exposed felspar folds formation fossil galena geochemical Geol geological mapping Geological Survey Geologists Jr geophysical Ghosh Glossopteris Glossopteris flora gneiss gneissic complex Gondwana grade grained granite gneiss greenish greenstone belts grey Group hill holes horizon indicated investigation Kashmir Kurnool laterite limestone Lower mapped an area metamorphism mineralisation minerals occur Panjal trap pegmatite phyllite pits Project pyrite quartz quartz veins quartzite Quaternary Rajasthan Raniganj regional river rock types samples sand sandstone Sarvashri scale schist schistose seams sediments shale shear zone Shri Singh Siwalik spillway sq km Srivastava stratigraphic studies sulphide Survey of India thickness traverse trending tunnel unconformity Upper upto valley varies Vindhyan