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�1 <br /> 4 <br /> T <br /> Major DtvtStgnS Grapntc Litter Typical Descriptions <br /> ' Symbols Symbol <br /> •1 • GW Well Graded Gravels Gravel-Sand <br /> s;r+ Mixtures Little or No Fines <br /> Gravel and Graveliv Clean Graveis 0.% 0 <br /> ' Sails no ft <br /> Coarse (little or no tines) r s GP Poorly-Graded Gravels Gravei-Sand Mixtures <br /> Grained Little or No fines <br /> Soils I Ar <br /> More than A%of � r I� Got Silty Gravels Gravel Sand Silt Mixtures <br /> Coarse Fraction Gravels with Fines <br /> Retalre on No 3 <br /> Steve <br /> ' (appreciable amount of / GC Clayey Gravels Gravel-Sand Clay Mixtures <br /> fines) r� <br /> f* <br /> o a SW Well Graded hands Gravellv Sands Little or Vo <br /> o' <br /> Fines <br /> Sana} ana Clean Sand <br /> c �r <br /> Sandy Soils c ° '•i�.' <br /> ' More dlan 30°/or (little or no mes) SP Poor Graded Sands Grayelly Sands Little or No <br /> Matenai is Lar-er on Fines <br /> No 200 Sieye Size <br /> ' ► SM Silty Sands Sana Silt Mixtures <br /> More than'0°5 of a r <br /> Coarse Fraction Sands with Fines <br /> Passing on No 4 Sieve <br /> (appreciable amoanr °_ 6:14 Sc CIavej Sands Sand-Silt Mixtures <br /> at fines} y ° <br /> 1 E jbfL Inorganic.Silts and Very Fme Sands Rock Flour <br /> I I 1 I Silty or Clavev Fine Sands or Clayey Silts with <br /> I I I Sli6ht Plasucity <br /> Fine Grained Soils Silts Liquid Umn CL Inorganic Clays of Low t Medium Plasticity <br /> and Clays Less than o0 / j Gravelly Clays Sandy Clays Silt,Clays Lean <br /> Clays <br /> ' I I OL Organic Silts and Organic Silty Chit's of Law <br /> Plasacity <br /> III ii <br /> MH Inorganic Silts Micaceous or Dtatom tceoua Fine <br /> Sana or Silty Soils <br /> Mort than 0 of' Silts Ltauid Limit CH Inorganic.Clays of Htgh Plasncin Fat Clays Materiai is$mall. on and C ays jireacqr than 50 <br /> No 200 Sieve Size I <br /> 01— <br /> OH Organic Clays of Medium to High Plasticnry <br /> Organic Silts <br /> PT Peat Humus SNy amp Soils with High Organic <br /> ' Highly Organic Sons — Contents <br /> Note Duel Svrnbols Us,d to Indicate Borderline Soil Classifications <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> ' LUSH GEOSCIENCES <br /> FIGURE 131 <br />