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« DRAWING LINES ON PAPER AND SAND: ANATOMY OF A CARTOON CLASH | Main | Social vs Environmental Tipping Points »

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ISO 14688 grades sands as fine, medium and coarse with ranges 0.063 mm to 0.2 mm to 0.63 mm to 2.0 mm. In the United States, sand is commonly divided into five sub-categories based on size: very fine sand (1⁄16 - 1⁄8 mm diameter), fine sand (1⁄8 mm - 1⁄4 mm), medium sand (1⁄4 mm - 1⁄2 mm), coarse sand (1⁄2 mm - 1 mm), and very coarse sand (1 mm - 2 mm).

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