Records of the Geological Survey of India, Volume 86

alignment anorthosite appears Assistant associated bands Bihar Bombay carried cent Circle clay coal collection consist contain continued covered deposits depth detailed district drilling early east Economic effect emerald Engineering examined fault feet field formations geological mapping Geological Survey Geologist gneisses Government grade granite ground gypsum headquarters hill important indicate industry Iron known leave lignite limestone localities located Lower Madhya Pradesh Madras magnetism material Messrs Metal mica miles mineral mines Mysore Nagpur noted November occur origin pegmatites places possible present production pyrite quantity quartz quartzites Rajasthan range recorded reported reserves Returned river road rocks samples sand sandstone schists seam seen shale Shaly sheet strike suggested suitable Survey of India TABLE thickness thin tion tons Upper Valley valued varying veins yield zone