Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 1
... included under the term mica possesses the characteristic of a highly developed cleavage , permitting the mineral to be split into extremely thin , flexible and rather resilient films . The two chief varieties so essential to electrical ...
... included under the term mica possesses the characteristic of a highly developed cleavage , permitting the mineral to be split into extremely thin , flexible and rather resilient films . The two chief varieties so essential to electrical ...
Page 17
... included here . Low quality mica includes all block mica inferior to good stained , all splittings , and fuse discs . II . USES . Mode of use . A distinctive feature of mica is that it is entirely used in its mineral condition , unlike ...
... included here . Low quality mica includes all block mica inferior to good stained , all splittings , and fuse discs . II . USES . Mode of use . A distinctive feature of mica is that it is entirely used in its mineral condition , unlike ...
Page 28
... included schists . Their structure suggests the formation first of a quartz core along a vein channel , and the solutions then soaked outwards into the walls , replacing or recrystallising the schists to form albite and muscovite . Such ...
... included schists . Their structure suggests the formation first of a quartz core along a vein channel , and the solutions then soaked outwards into the walls , replacing or recrystallising the schists to form albite and muscovite . Such ...
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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