Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 24
... surface cover tends to obscure the veins . The greatest produc- tion from the belt , in the past , has been within the Kodarma Reserved Forest , a tract of country occupying 56-93 square miles north of Kodarma , but an increasingly ...
... surface cover tends to obscure the veins . The greatest produc- tion from the belt , in the past , has been within the Kodarma Reserved Forest , a tract of country occupying 56-93 square miles north of Kodarma , but an increasingly ...
Page 26
... surface , should not continue to a much greater depth . These mica pegmatites bear no relation to the present land surface , but were formed at a high temperature below a great thickness of the earth's crust which has been since removed ...
... surface , should not continue to a much greater depth . These mica pegmatites bear no relation to the present land surface , but were formed at a high temperature below a great thickness of the earth's crust which has been since removed ...
Page 43
... surface where it is stored in the godowns preparatory to cutting . The crude mica is either weighed underground or at surface . Transport is either by bullock carts or motor lorries . Most of the roads are execrable , and , in the rains ...
... surface where it is stored in the godowns preparatory to cutting . The crude mica is either weighed underground or at surface . Transport is either by bullock carts or motor lorries . Most of the roads are execrable , and , in the rains ...
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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