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Geology of the Nonmetallics
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alumina anhydrite Anon apatite asbestos average barite Basin bauxite beds belt bentonite beryllium bodies Brazil brines calcite calcium carbonate chemical chloride chromite clay commercial complex concentrated contain County Cretaceous crystalline crystals deposits diatomite district dolomite dunite east extracted feet thick feldspar figure fluorite fluorspar Formation formed Geol gneiss grade granite graphite gypsum hydrothermal igneous ilmenite Industrial Minerals kaolin kaolinite Lake largest layers lenses limestone lithium magnesite magnesium major manganese material metamorphism Mexico mica miles mined Minerals and Rocks Miocene Mountain muscovite nepheline syenite northern occurs olivine operates orebody oxide pegmatites perlite phosphate potash Precambrian production Province pumice pyrite pyrophyllite quarry quartz quartzite range refractory reserves rhyolite S.J. Lefond salt sand sandstone schist sedimentary sediments shale silica sodium South Africa stone stratiform sulfate sulfur Surv talc Tertiary tion tons tuff Upper USSR veins volcanic western zeolites zone
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