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Sediment classification according with the Unified Soil Classification System <br /> GW Well-graded gravels, gravel/sand mixture,little or no fines <br /> GP Poorly graded gravels,gravel/sand mixture,little or no fines <br /> GM Gray calcareous gravel, sand/silt mixture <br /> GC Gray calcareousgravel/sand/clay mixtures <br /> SW Well graded sands,gravelly sands, little or no fines <br /> SP Poorly graded sands,gravelly.sands,little or no fines <br /> SM Silty sands, sand/silt mixtures <br /> SC Clayey sands, sand/clay mixtures <br /> ML Inorganic silts and very fine sands, silty/clayey silty/clayeyfine sand <br /> CL I Inorganic clays of low to medium plasticity,sandy silty or lean clays <br /> OL Organic silts and or ark silty clays of low plasticity <br /> MH Inorganic silts, micaceous or diatomaceous fine sandy or silty soils, elastic silts <br /> CH Fat clays <br /> OH Fat organic clays <br /> PT Peat,humus,-and other organic swamp soils <br /> SP-SM I Sandy,gravelly,silty mixtures <br /> L Limestone <br /> S Sandstone <br />