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SOIL CLASSIFICATION CHART <br />MAJOR DIVISIONS <br />CLEAN <br />GRAVEL GRAVELS <br />AND <br />GRAVELLY <br />SOILS (LITTLE OR NO FINES) <br />COARSE <br />GRAINED GRAVELS WITH <br />SOILS MORE THAN 50%FINES <br />OF COARSE <br />FRACTION <br />RETAINED ON NO. <br />4 SIEVE (APPRECIABLE <br />SYMBOLS <br />GRAPH LETTER <br />...... <br />f.lf' GW <br />d'' b.6,5 bfbode€6-06 GP000000o-Ob°o-.Db <br />)PO©130<: GM <br />000000 <br />.Ac o.ho <br />GC <br />TYPICAL <br />DESCRIPTIONS <br />WELL-GRADED GRAVELS, GRAVEL - <br />SAND MIXTURES, LITTLE OR NO <br />FINES <br />POORLY-GRADED GRAVELS, <br />GRAVEL - SAND MIXTURES, LITTLE <br />OR NO FINES <br />SILTY GRAVELS, GRAVEL - SAND - <br />SILT MIXTURES <br />CLAYEY GRAVELS, GRAVEL - SAND - <br />AMOUNT OF FINES) 3%2 CLAY MIXTURES <br />MORE THAN 50% <br />OF MATERIAL IS <br />LARGER THAN <br />NO. 200 SIEVE <br />SIZE <br />SAND <br />AND <br />SANDY <br />SOILS <br />CLEAN SANDS <br />(LITTLE OR NO FINES) <br />SILTS <br />FINE AND <br />GRAINED CLAYS <br />SW <br />SP <br />SM <br />SC <br />ML <br />illilll,lililll. <br />MH <br />CH <br />WELL-GRADED SANDS, GRAVELLY <br />SANDS, LITTLE OR NO FINES <br />POORLY-GRADED SANDS, <br />GRAVELLY SAND, LITTLE OR NO <br />FINES <br />SANDS WITH SILTY SANDS, SAND - SILT <br />MORE THAN 50%FINES MIXTURES <br />OF COARSE <br />FRACTION <br />PASSING ON NO. <br />4 SIEVE (APPRECIABLE CLAYEY SANDS, SAND -CLAY <br />AMOUNT OF FINES)MIXTURES <br />INORGANIC SILTS AND VERY FINE <br />SANDS, ROCK FLOUR, SILTY OR <br />CLAYEY FINE SANDS OR CLAYEY <br />SILTS WITH SLIGHT PLASTICITY <br />INORGANIC CLAYS OF LOW TO <br />LIQUID LIMIT 'Illill'111'Illilt /./.MEDIUM PLASTICITY, GRAVELLY <br />LESS THAN 50 CLAYS, SANDY CLAYS, SILTY CLAYS, <br />LEAN CLAYS <br />SOILS <br />0L ORGANIC SILTS AND ORGANIC <br />SILTY CLAYS OF LOW PLASTICITY <br />MORE THAN 50% <br />OF MATERIAL IS <br />SMALLER THAN <br />NO. 200 SIEVE <br />SIZE <br />SILTS <br />AND <br />01 AY <br />LIQUID LIMIT <br />GREATER THAN 50 <br />INORGANIC SILTS, MICACEOUS OR <br />DIATOMACEOUS FINE SAND OR <br />SILTY SOILS <br />INORGANIC CLAYS OF HIGH <br />PLASTICITY <br />8=258: <br />3zB=tk:Zzkzsk <br />.A-A.A.A.A.AA-A-/ <br />4,#...-'t-t <br />------ <br />0H ORGANIC CLAYS OF MEDIUM TO <br />HIGH PLASTICITY, ORGANIC SILTS <br />HIGHLY ORGANIC SOILS & 211£ 2.-f£ 1-f£ -PT <br />34 04 04 04 <br />- il-1 - <br />PEAT, HUMUS, SWAMP SOILS WITH <br />HIGH ORGANIC CONTENTS <br />NOTE: DUAL SYMBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS <br />0$*0%