Classification of the different types of sediments, adapted from ASTM (1996)
|Sediment type||Particle size|
|Boulders||More than 300 mm|
|Cobblers||from 75 to 300 mm|
|Coarse Gravel||from 19 to 75 mm|
|Fine Gravel||from 4.75 to 19 mm|
|Sand||from 4.75 mm to 75 μm|
|Silt/Clay||Less than 75 μm|
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