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i <br /> MAJOR DIVISIONS ,I GROUP 'dRAVEL <br /> UP NAME <br /> ]SYMBOL, <br /> -- - _GRAVEL CLEAN GW IRADED GRAVEL,COARSE MORE THAN GRAVEL _ i COARSE GRAVELGRAINED 50% OF GP -GRADED - <br /> SOILS FRACTON OARSE I -- � _. -MORETHAN j _50% RETAINED ON I GRAVEL GM RAVELRETAINED NO.4 SIEVE j WITH FINES - -ON N0.200 - - --- <br /> GC GRAVELSIEVE SAND j CLEAN SW i RADED SAND, <br /> MORE THAN , SAND FINE TO COARSE SAND <br /> 50%OA SE ! SP POORLY-GRADED SAND <br /> COARSE --- - - - _ .��.--- - -- <br /> FRACTION SAND WITHIF� SM ' SILTY SAND <br /> __�� <br /> PASSES N0.4 FINES - <br /> _ _ SIEVE I SC II CLAYEY SAND <br /> SILT AND ! INORGANIC <br /> FINE CLAY i�ML _.SILT - - ��- ----- <br /> GRAINED LIQUID LIMIT j- _ _ CL CLAY -- <br /> . SOILS I LESS THAN 501 ORGANICOL ORGANIC SILT, ORGANIC <br /> MORE THAN CLAY <br /> PASSES SILT AND <br /> INORGANIC MH SILT OF HIGH <br /> CLAY y i PLASTICITY, ELASTIC <br /> SIEVE LIQUID LIMIT { i SILT <br /> SIEVE 50 OR MORE <br /> ! CH CLAY OF HIGH <br /> PLASTICITY, FAT CLAY <br /> _ - - - -- - - <br /> ORGANIC i� OH I ORGANIC CLAY, <br /> ORGANIC SILT <br /> HIGHLY ORGANIC SOILS PT j PEAT <br /> Ref; Unified Soil Classification System; from American Society for Testing and Materials, 1985 <br />