Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 14
... normally as follows , according to colour , etc : - Clear green . Spotted green . Pale or light green . Bottle green . Green dotted or spotted . Yellowish mica . Brown mica . 1 Note.- " Air " means , of course , gas . For the purpose of ...
... normally as follows , according to colour , etc : - Clear green . Spotted green . Pale or light green . Bottle green . Green dotted or spotted . Yellowish mica . Brown mica . 1 Note.- " Air " means , of course , gas . For the purpose of ...
Page 25
... normally of plagioclase felspar and quartz , but also commonly contain microcline and such minerals as biotite , tourmaline , garnet , apatite , and very rarely beryl . In two or three veins specimens of columbite - tantalite have been ...
... normally of plagioclase felspar and quartz , but also commonly contain microcline and such minerals as biotite , tourmaline , garnet , apatite , and very rarely beryl . In two or three veins specimens of columbite - tantalite have been ...
Page 26
... normally contain workable muscovite . Some veins in muscovite - quartz - schist contain mica . The pegmatites in the granite are pink microcline - quartz rocks , commonly with a little albite which seems to have replaced the potash ...
... normally contain workable muscovite . Some veins in muscovite - quartz - schist contain mica . The pegmatites in the granite are pink microcline - quartz rocks , commonly with a little albite which seems to have replaced the potash ...
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Common terms and phrases
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