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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISION. CLASSIFICATION TYPICAL NAMES <br /> SYMBOL <br /> GRAVELS CLEAN GRAVELS GW WELL GRAOEO GRAVELS.GRAVEUSAND MIXTURES <br /> MORE THAN <br /> LATH LITTLE TO <br /> COARSE HALF COARSE NO FINES GP POORLY GRADED GRAVELS,GRAVEUSAND MIXTURES <br /> GRAINED FRACTION IS <br /> G <br /> LARGER THAN GRAVEL WITH M SILTY GRAVELS.POORLY GRADED GRAVEI/SANbLSILi MIXTURE <br /> .SOILS NO.4 SIEVE OVER 12%FINES <br /> GC CLAYEY GRAVELS.POORLY GRADED GRAVEUSANOLG..AY MIXTURI <br /> MORE THAN ,' WELLGRADED SANDS.GRAVELLYSANDS <br /> HALF OF THE SANDS Ol£AN SANDS SW <br /> MATERIAL IS MORE THAN WlTT{LITTLE TO <br /> LARGER THAN HALF COARSE NO FINES Sp POORLY GRADED SANDS,GRAVELY SANDS <br /> NO.200 SIEVE FRACTION IS <br /> SMALLER THAN SANDS 4V1T7{ SM SILK SANDS,POORLY GRADED SANq/SIIT MIXTURES <br /> NO'4 SIEVE OVER 12%FINES <br /> Sc CLAYEY SANDS,POORLY GRADED SANO/GULT MIXTURES <br /> ML INORGANIC SILTS AND-VERY FINE SANDS,ROCK FLOUR.SILTY OF <br /> FINE CLAYEY FINE SANDS,OR CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> GRAINED SILTS ANO CLAYS INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, <br /> SOILS <br /> IIQUiO LIMITLESS THAN SD CL . <br /> GRAVELLY CLAYS.SANDY CLAYS,SILTY CLAYS,LEAN CLAYS <br /> - - <br /> OL ORGANIC CLAYSAIA ORGANIC SILTY CLAYS OF LOW PLASTICITY <br /> MORE THAN INORGANIC SILTS,MICACEOUS OR DIATOMACEOUS <br /> HALF OF THE SILTS ANO CLAYS MH FINE SANDY OR SILTY SOILS,ELASTIC SILTS <br /> MATERIAL IS <br /> O 206 SIEVE LIQUID LIMIT GREATER THAN 5Q N CH <br /> INORGANIC CLAYS Or HIGH PLASTICITY.FAT CLAYS <br /> OH ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICL Y,ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS ' Pt PEATANDOTHER HIGHLY ORGAMCSILTS <br /> Plate I <br />