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UNIFIED SOIL CL4SSIFICA T ION SYSTEM! <br /> MAJOR DIVISIONS ISYMEOLSi TYPICAL. NAMES <br /> 1 <br /> GW O <br /> Qat Hell graded gravets or grovel-sand mixtures,little or no tints <br /> GRAVELS �� 71 <br /> c-P p c_,11Paariy graded gravels or gravel-gond mixtures,tittle or no Cuies <br /> MORE THAN 1/2 OF GM •�� Silty-gravels, gravel-sand-silt mixtures <br /> ' p r7i COARSE FRACTION> An <br /> WNa 4 SIV/I:SIZE ravala ravel-sand-c1a mixtures <br /> S GC Clayey 9 , 4 Y <br /> ' <br /> SIN Well graded sands or grandly sands, little R Za lines <br /> SANDS u1 o , <br /> ,Nr 4P I { Pocrly graded sands or gravelly sands, little or no lines <br /> a � <br /> p ti' MORE THAN I/Z OF <br /> U GSM T I: Silly sands, sand-illi mizfures <br /> 1 COARSE FRACTICN C <br /> NO 4 SIEVE SIZE <br /> .50Clayty sands, sand-clay mixtures <br /> N ML 4i inorganic sills andvery fine sands,rack flair, silty or clayey <br /> ' k rine sands or clayey $ilts with aligtd Dlasttciiy <br /> -� N SILTS & CLAYS <br /> CL Inorganic clays of law lo mtdwm 9lasttaty, gravelly clays, <br /> /4 sandy Clays, silty clays, lean days <br /> 0 LL<50 OLr I� t 1.I Organic silts and organic silty clays of lour plastidy <br /> ' N <br /> Inorganic slits,micaceous or diatomaceous fine sandy or silty <br /> soils,tlastic sills <br /> SILTS CLAYS <br /> 2 i; CH Inorganic clays of high Ptasttctty, [at clays <br /> O- ? t l OH ��� organic clays of medium to high ptar arg <br /> ty,oanic silly clays, <br /> organic silts <br /> HIGHLY ORGANIC SOILS Pt Paat and aiher highly organic soils <br /> 1 <br /> i'1 AT4 N CHART <br /> ' RANGE OF GRAIN SIZES <br /> CLASSIFICATION U S SlanJord Grain Size <br /> Sleve Size In Millimeters <br /> ' BOULDERS Above IZi. Above 305 <br /> COBBLES I l2- t4 3" BC5 to 7,2 l <br /> ' GRAVE'_ Z" to No 4 76 Z t0 4 76 <br /> COARSE 3"a 3r4 76 Z 'o 19 1 <br /> FINE 3/4' to Na4 191 la 476 <br /> ' SAND No 4 to No 200 476 to 0074 <br /> COARSE No 4 to No 10 4 76 to 2 00 <br /> MEDIUM No t0 to No 40 200 to 04ZO <br /> FINE Ab'40 to No 200 0420 to 0074 <br /> ' SILT ck CLAY Below No 200 Selo, No 0074 <br /> FJ_11N SIZE CHART <br /> WM J HUNTER & ASSOC UNIFIED SOIL CLASSIFICATION SYSTEM! PLATE XII <br /> ' 2220 LONIA VISTA DR <br /> SACRAMENTO, CA 95825 <br />