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r <br /> i 1 <br /> Unified Soil Classification System <br /> Major Divisions Symbols Typical Names <br /> GW Well graded gravels or grave!-sand mixtures, <br /> li le or no fines <br /> Gravels o <br /> O OGP Poorly graded gravels or gravel-sand mixtures, <br /> O little or no fines <br /> '° (More man half of O O <br /> as <br /> H n coarse fraction� o °0 0 <br /> ° GM Sandy gravels, gravel sand-silt mixtures <br /> C) no.4 sieve size) ° <br /> 0000 <br /> c (fgVV GC Clayey gravels,gravel-sand-clay mixtures <br /> tl ___ ${i{/ Well graded sands or gravelly sands,little or no fines <br /> =i m a = <br />