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MAJOR DIVISIONS GRAPHIC LETTER TYPICAL DESCRIPTIONS <br /> SYMBOL SYMBOL <br /> I WELL GRADEDORAVELS GRAVEL <br /> r • ' GW SAND MIXTURES,LITTLE OR NO <br /> GRAVEL � ** t FINES <br /> GRAVED;Y CLEAN GRAVELS N 40 <br /> SOILS (LITTLE OR NO POORLY-GRADED GRAVEL$ <br /> FINES) , ,•• <br /> .�.....� GP GRAVE LiAHpMIXTURES LITTLE <br /> COARSE �.' ::. OR NO FINES <br /> GRAINED .••' <br />' SOILS <br /> SILTYGRAVELS GRAVELdAND <br /> MORE THAN 60% <br /> GRAVELS MATH FINES GM SILT MIXTURES <br /> OF COARSE FRAC (APPRECIABLE <br /> TION RE7/opto <br /> ON N I V AMOUNT OF FINES) <br /> CLAYEY GRAVELS GRAVEL-SAND- <br /> GC CLAY MIXTURES <br /> I <br /> I �• �e• <br /> WELL-GRADED SANDS GRAVELLY <br />[ <br /> CLEAN SAND • 0. <br /> Sw SANDS LITTLE OR NO FINES <br /> SANG <br /> •.•e • <br /> AND k SANDY (LITTLE OR NO • '• •o <br /> SOILS FINES) t }Ir„ <br /> :.amu' �, POOR LY-GR AGED SANDS GRAVEL <br /> MORE THAN 50% SA LY SANDS LITTLE OR NO FINES <br /> OF MATERIAL IS =LLrs �4 <br /> LARGER THAN NO <br /> OO SIEVE SIZE <br /> SILTYSANOS SAN04ILT <br /> MOR E THAN SQ% <br /> BANDS WITH FINES SM MIXTURES <br /> OF COARSE FRAC 1APFRECIABLE <br /> TION PASSING AMOUNT OF FINES) <br /> NO 4SIEVE CLAYEYSANDS SANOCLAY <br /> Sc MIXTURES <br /> t <br /> 4 <br /> INORGANIC SILTS AND VERY FINE + <br /> ML SANDS ROCK FLOUR SILTY OR r <br /> CLAYEY FINE SANDS OR CLAYEY ' <br /> SILTS MATH SLIGHT PLASTICITY <br /> FINE SILTS INORGANIC CLAYS OF LOW11`0 I� <br /> GRAINED AND LIQUID LIMIT MEDIUM PLASTICITY GRAVELLY <br /> SOILS CLAYS LESS THAN 50 CL CLAYS,SANDY CLAYS SALTY <br /> CLAYS LEAN CLAYS,' <br /> I I I I I I I!I ORGANIC SILTS AND ORGANIC t <br /> 1 1 1 1 1 1 1 pL SILTY CLAYS OF LOW PLASTICITY <br /> )Il�I�I�I <br /> f ) til ] 'I <br /> F INORGANI&SiLTS MICACEOUS OR <br /> DIATOMACEOUS FINE SAND OR <br />( MH SILTY SOILS <br /> MORE THAN 60% SILTS <br /> OF MATERIAL IS AND LIQUID LIMIT INORGANIC CLAYS OF"ION <br /> lode <br /> THAN NO CLAYS GREATER THAN 50 CH <br /> e 512E <br /> PLASTICITY,FAT CLAYS <br /> I V <br /> V <br /> Y ////// ORGANIC CLAYS OFMEpWMTO <br /> OH HIGH PLASTICITY,ORGANIC SILTS <br /> //AAAA <br /> HIGHLY ORGANIC SOILSPT PEAT HUMUS SWAMP SOILS WITH <br /> HIGH ORGANIC CONTENTS <br /> NOTE DUAL SYMBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS <br /> n <br /> n <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> 0 <br /> L <br /> PLATE <br />