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GENERAL GEOGRAPHY AND OUTLINE OF
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aluminium apatite Average ball clay beach mineral sands beach sands carbon cent ceramic industry Ceylon charnockitic chemical clay materials clay mineral coastal Colombo composition contain Corporation crust crystalline depth dolomite dolomitic limestone drilling earth economic electrical energy Eppawala estimated exploration exports felspar formations garnet gem gravels geological mapping Geological Survey Department gibbsite gneisses grade graphite Herath Highland Series hydropower igneous ilmenite important iron oxides island kaolin kaolinite laterite limestone magnesium magnetite mainly manufacture metal metres mica million tons mineral deposits mineral resources mineral sands mining Miocene monazite occurs Panirendawa pegmatites peneplain petroleum phosphate phosphate rock plant Precambrian presented to show Pulmoddai quantities quartz quartzites Range Ratnapura raw materials refractory region reserves rutile sector sedimentary Seruwila silica silica sand sillimanite Sri Lanka surface Table temperature titanium types undertaken uranium variety veins Vijayan Walawe World production zircon Zone