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• <br /> MAJOR DIVISIONS ; GROUP GROUP NAME <br /> '`SYMBOL <br /> GRAVEL CLEAN GW (WELL-GRADED GRAVEL, <br /> COARSE MORE THAN GRAVEL (FINE TO COARSE GRAVEL <br /> GRAINED 50% OF GP POORLY-GRADED <br /> SOILS COARSE GRAVEL <br /> MORE THAN FRACTION <br /> 5011/0 RETAINED ON GRAVEL I GM ISILTY GRAVEL <br /> RETAINED NO 4 SIEVE WITH FINES I GC CLAYEY GRAVEL <br /> ON NO 200 <br /> SIEVE SAND CLEAN SW WELL-GRADED SAND, <br /> MORE THAN SAND FINE TO COARSE SAND <br /> 50% OF SP <br /> COARSE POORLY-GRADED SAND <br /> FRACTION SAND WITH SM SILTY SAND <br /> PASSES NO 4 FINES SC CLAYEY SAND <br /> SIEVE <br /> SILT AND INORGANIC I ML ISILT <br /> FINE CLAY ICL CLAY <br /> . GRAINED LIQUID LIMIT <br /> SOILS LESS THAN 50 ORGANIC F__6L ORGANIC SILT, ORGANIC <br /> MORE THAN CLAY <br /> 500/0 SILT AND INORGANIC MH SILT OF HIGH <br /> PASSES CLAY PLASTICITY, ELASTIC <br /> NO 200 LIQUID LIMIT SILT <br /> SIEVE S0 OR MORE <br /> CH CLAY OF HIGH <br /> PLASTICITY, FAT CLAY <br /> ORGANIC OH ORGANIC CLAY, <br /> ORGANIC SILT <br /> HIGHLY ORGANIC SOILS PT PEAT <br /> Ref Unified Soil Classification System, from American Society for Testing and Materials, 1985 <br /> i <br />