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Table A - 1 <br />Unified Soil Classification System - ASTM D2487 <br /> <br /> Major Divisions Symbol/ I Description <br /> Graphic[ ,, <br /> GW ~?r~ Well Graded Gravels, <br /> Gravels Clean gravels~ Grave!,- Sand Mixtures <br /> with little or <br />(More than 50% of no fines GP Poorly Graded Gravels, <br />coarse fraction is larger Gravel - Sand MLxtures <br /> <br /> than the GM ~ Silty Gravels, Poorly Graded <br /> #4 sieve size.) Gravels with Gravel - Sand - Silt Mixtures <br /> over 12% fines <br /> GC Clayey Gravels, Poorly Graded <br /> [~ Gravel ~ Sand - Clay Mixtures <br /> SW Well Graded Sands, Gravelly <br /> Sands Clean sands .[tq~[[-['° ~,~1 Sands <br /> with little or <br /> (More than 50% of no fines SP .... ~ ':[:" Poorly Graded Sands, Gravelly <br /> Sands <br />coarse fraction is smaller .i,, ' ................ <br /> than #4sieves~ze.) SM ::t.:I~t'i'l Silty Sands, Poorly Graded <br /> Sands with ::. :: '(:: Sand - Silt Mixtures <br /> over 12% fines SC ! ii!. !'' Clayey Sands, Poorly Graded <br /> Sand - Clay Mixtures <br /> ML Inorganic Silts <br /> Silts and Clays <br /> (Liquid limit less than 50) CL Inorganic Clays of Low to <br /> Medium Plasticity, Lean Clavs <br /> <br /> OL liiiilllt], , , ,, Organic Clays and Or.amco <br /> MH[lllll]lInorganic Elastic Silts <br /> Silts and Clays <br /> ~/////~ Inor.ga. nic Clays of High <br /> <br /> OH ~/~i~/~/~ Organic Clays Of Medium <br />....... "~-/~"~d Hfgh Plastf¢ity, Organic S~ts <br /> Highly Organic Soils Pt ~.~] Peat and other Highly Oroan/c <br />........ ¢55 t Soils <br /> <br /> <br />