Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 25
... veins , particularly of the flat - dipping type , which cut across the schist cleavage . Dips of the veins are at all angles , from nearly horizontal to vertical . It is noticeable that many of the large flat veins are amongst the best ...
... veins , particularly of the flat - dipping type , which cut across the schist cleavage . Dips of the veins are at all angles , from nearly horizontal to vertical . It is noticeable that many of the large flat veins are amongst the best ...
Page 27
... veins is very rare . However , occasional veins show a sequential deposition , with move- ment along the veins during deposition . In some of these latter veins mica has formed along the fault wall and the books are arranged at right ...
... veins is very rare . However , occasional veins show a sequential deposition , with move- ment along the veins during deposition . In some of these latter veins mica has formed along the fault wall and the books are arranged at right ...
Page 28
... vein wall . This suggests the escape of solutions high in volatiles from the vein channel into the walls . Pipe veins and irregular ramifying spurs of all dimensions may cut across the schist cleavages in diverse directions , varying ...
... vein wall . This suggests the escape of solutions high in volatiles from the vein channel into the walls . Pipe veins and irregular ramifying spurs of all dimensions may cut across the schist cleavages in diverse directions , varying ...
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2nd quality albite amount approximately average Bihar Bihar mica Black dotted Black spotted block and splittings block mica built-up mica Calcutta Canada cleavage condenser films condenser plates countries country rock crude mica dealers diopside district electrical exported block feet felspar Geological Survey Giridih grade granite ground mica Heavily stained 1st high quality mica India Indian mica insulation Intermediate stained J. A. Dunn Kodarma Kodarma Reserved Forest large number larger sizes Lepidolite loose splittings M. S. Krishnan Madagascar Madras mainly manufacture mica belt mica exported mica industry mica mining mica produced mica splittings mica trade mica-schists micanite microcline miles muscovite obtained pegmatites percentage phlogopite potash felspar pyroxenite quality block mica quartz quartz core Rajputana Rajputana mica recent recorded ruby mica schists scrap mica sheet mica Short tons smaller solutions South stained 1st quality stoping Survey of India Table 13 trimmed United uparchalla veins washers