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GRAPHIC LETTER MAJOR DIVISIONS BYMBOL SYMBOL TYPICAL DESCRIPTIONS r,+; WELL GRADEDGRAVELS GRAVEL GW SAND MIXTURES LITTLE OR NO • GRAVEL 0/ f FINES AND CLEAN GRAVELS • w 0 GRAVELLY SOILS ILITTLEORNOt••�'6 POORLY GRADED GRAVELS FINESI >R •: (iP GRAVELSAND MIXTURES LITTLE COARSE •: .•• OR NO FINES Il GRAINED •'•� SOILS SILTY GRAVELS GRAVELSAND GRAVELS WITH FINES GM SILT MIXTURES MORE THAN 50% OF COARSE FRAC (APPRECIABLE TION RETAINED AMOUNT OF FINES) ON k 6-4-5-Iv CLAYEY GRAVELS GRAVEL-SAND GC CLAY MIXTURES • • • • r WELL GRADED SANDS GRAVELLY •••� SW SANDS LITTLE CR NO FINES SAND CLEAN SAND '••p •��o r AND ILITTLE OR NOSAN • o SOILDS FINES) s ` POORLY GRADED SANDS GRAVEL MORE THAN 50% SP LY SANDS LITTLE OR NO FINES OF MATERIAL IS i LARGER THAN NO �E SIZE SILTY SANDS SAND SILT MORE THAN 50% SANDS WITH FINESSM MIXTURES OF COARSE FRAC (APPRECIABLE TION PASSING AMOUNT OF FINES) NO 4 SIEVE CLAYEY SANDS SAND-CLAY ScFEZ,., MIXTURES INORGANIC SILTS AND VERY FINE ML SANDS ROCK FLOUR SILTY OR CLAYEY FINE SANDS OR CLAYEY SILTS WITH SLIGHT PLASTICITY FINE SILTS INORGANIC CLAYS OF LOW TO GRAINED AND UOUID LIMIT CL MEDIUM PLASTICITY GRAVELLY SOILS CLAYS LESS THAN 50 CLAYS SANDY CLAYS SILTY CLAYS LEAN CLAYS (I 1 1 1 1 1 1 ORGANIC SILTS AND ORGANIC I r l l l l l l l OL SILTY CLAYS OF LOW PLASTICITY I�I�I�I�r Ilrlr INORGANIC SILTS MICACEOUS OR MH DIATOMACEOUS FINE SAND OR SILTY SOILS MORE THAN 50% SILTS OF MATERIAL IS AND LIQUID LIMIT INORGANrC CLAYS OF HIGH MALLfR THAN NO CLAYS GREATER THAN 60 CH PLASTICITY FAT CLAYS 20tl"V SIZE ORGANIC CLAYS OF MEDIUM TO OH HIGH PLASTICITY ORGANIC SILTS PEAT HUMUS SWAMP SOILS WITH HIGHLY ORGANIC SOILS PT HIGH ORGANIC CONTENTS NOTE DUAL SYMBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS UNIFIED SOIL CLASSIFICATION SYSTEM