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is the extraction of sand, mainly through an open pit (or sand pit) but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. sand is often used in manufacturing, for example as an abrasive or in concrete.it is also used on icy and snowy roads usually mixed with salt, to lower the melting point temperature, on the road surface.

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is the extraction of valuable minerals or other geological materials from the earth, usually from an ore body, lode, vein, seam, reef or placer deposit.these deposits form a mineralized commodity that is of economic interest to the miner. ores recovered by include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.

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