Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 41
... recent year , some 150-200 underground mines , coming under the Mines Act , were being worked at depths varying down to 500 feet from the surface . About 14 of these mines supplied 30 per- cent of the total production of mica of all ...
... recent year , some 150-200 underground mines , coming under the Mines Act , were being worked at depths varying down to 500 feet from the surface . About 14 of these mines supplied 30 per- cent of the total production of mica of all ...
Page 61
... recent years the original firm of F. F. Chrestien & Co. has separated its mining activities , under the name of Chrestien Mining Co. , from its purely marketing business . Other companies which , in addition to carrying out extensive ...
... recent years the original firm of F. F. Chrestien & Co. has separated its mining activities , under the name of Chrestien Mining Co. , from its purely marketing business . Other companies which , in addition to carrying out extensive ...
Page
... recent memoirs there are monographs on Asbestos , Barytes , Bauxite , Coal , etc. , and a special Volume , LXXVI , has been set aside to include Water - Supply Papers . The most recent publications of the Memoirs are : — Volume LXIII ...
... recent memoirs there are monographs on Asbestos , Barytes , Bauxite , Coal , etc. , and a special Volume , LXXVI , has been set aside to include Water - Supply Papers . The most recent publications of the Memoirs are : — Volume LXIII ...
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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