bottom sample grain size 2

Bottom Sample Sediment Classification Tables. Sediment Size Classification, with Grain Size in millimeters: Clay - < 0.002 mm. Silt - 0.002-0.0625 mm. Sand (fine) - 0.00625-0.25 mm. Sand (medium) - 0.25-0.5 mm. Sand (coarse) - 0.5-2.0 mm. Gravel- 2.0-4.0 mm. Pebbles-4.0-64.0 mm. Cobble-64.0-256.0 mm. Boulder- >256.0 mm. Stone - 4.0-256.0+ mm.

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