HomeMy WebLinkAbout10SOIL CLASSIFICATION CHART
MAJOR DMSIONS
SYMBOLS
TYPICAL
DESCRIPTIONS
GRAPH
I LETTER
_ -
GRAVEL
GRAVELS CLEAN
00000 0
o 00 c o o�
o ONES
G W
WELL-GRADED GRAVELS, GRAVEL -
Fl "'RES. UmtF OR w�
GP
POORLY -GRADED GRAVELS,
GRAVEI-' _SAND MIXTURES. LITTLE
AND
GRAVELLY
(LITTLE OR NO FINES)
SOILS
OR NC FINES
COARSE
COARSE
50'A
I GRAVELS WITH
FINES
GM
SILTY GRAVELS. GRAVEL -SAND -
SILT MO TURFS
SOIL
FRACTION
ON oN-
sewCLAY
( OF ems)
GC
—
CLAYEY GRAVELS, GRAVEL-SAND-
HIXTUREs
MORE THAN 50C
SAND CLEAN SANDS
AND
- -
SW
we -GRADED SANDS. GRAVELLY
SANDS. LMILE OR NO FV&S
SP
POORLY -GRADED SANDS.
GRAVELLY SAND. LMLE OR NO
FINES
OF MATERIAL IS
LARGER
200 SIEVE�SZEp
SANDY (uTTE OR NO FINES)
SOILS
MORE THAN 50% SANDS WITH
OF COARSE FINES
SM
SILTY SANDS. SAND -SILT
worrul `s
PASSING ON ON. SSIEVE! (APPRECIABLE
I AMOUNT OF FINES)ANQS,
ScSC
CLAYEY SAND -CLAY
MD(TURES
INORGANIC SILTS AND VERY FINE
M L
SANDS, ROCK FLOUR. SILTY OR
-iAYEY FINE SANDS OR CLAYEY
SILTS WRT)1 SL)'-HT PLASTICITY
FINE
GRAINED
SOIL
SILTS LIOUID LIMIT
AND LESS THAN 50
CLAYS
CL
INORGANC CLAYS OF LOW TO
MEDIUM PLASTICITY GRAVELLY
CLAYS. SANDY CLAYS, SILTY
CLAYS. LEAN CLAYS
-------
OL
ORGANIC SILTS AND ORCANRC
SILTY CLAYS OF LOW PLAST)Cm
MORE Trial 50R
i
INORGANIC SILTS, MICACEOUS OR
OF MATS IS
200 SIEVE SIZE SMALLER THAN NO.I
M H
DATOMACEOUS FINE SAND OR
SILT), SOILS
CH
INORGANIC CLAYS OF wGH
PLASTICITY
1
SILTS
UOULD LIMIT
AND �� TaAN 50
CLAYS
OH
ORGANIC CLAYS OF MEDIUM TO
NIGH PLASTICITY. ORGANIC SILTS
:: a
HIGHLY ORGANIC
SOILS
PT
PEAT, HUVUS. SWAMP SOPS Wr,i
HIGH ORQW3C CONTENTS
NOTE DUAL SWBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS
$ � Fry's Supers?ore #30 FIGURE
FCenton, Washington SOIL CLASSIFICATION LEGEND
KLE1Ni"ELDER Pro}+et: 60-215&01 Mo—h 22. 2001