particle size

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The size of individual particles or grains of material, such as soil or sediment, expressed either in millimetres diameter or using the phi (ϕ) scale. Size classes for sediments range from very fine clays (less than 0.002 millimetres in diameter) and silts (between 0.002 and 0.05 millimetres), to coarse sands (range from 0.05 to 2.0 millimetres), and gravels (larger than 2 millimetres).

Subjects: Earth Sciences and Geography — Environmental Science.

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