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appear Assistant associated Attached bands Bihar Bombay carried cent Circle clay coal collected comprising contains continued covered Department deposits depth detailed Development district drilling dykes early east effect examined exposed extensive feet field formations geological mapping Geological Survey Geologist gneisses Government granite grey headquarters hill important inches India industry iron laterite leave lignite limestone localities located Madhya Madras material Metal mica miles mineral mines Mysore Nagpur noted noticed November occur pegmatites pits places Pleistocene portion Pradesh present production Project proposed quantity quarried quartz quartzites records reported reserves Returned river road rocks samples sand sandstones schists seen shales sheet sheet 73 square miles strike suitable Survey of India systematic thick thin tion tons types Upper varying veins village visited