Classification and Physical Properties of Soils - Elements of Soil Mechanics - page 17

Very silty SAND SM SML, etc Very silty SAND; subdivided as for SC

SF 15

Very clayey SAND SC SCL to Very clayey SAND (clay of low,

SCI 35 intermediate,

SCH high,

SCV very high,

SCE extremely high plasticity)

Gravelly or sandy SILTS
and CLAYS 35% to 65%
ines

Gravelly SILT MG MLG, etc Gravelly SILT; subdivide as for CG

FG

Gravelly CLAY CG CLG Gravelly CLAY of low plasticity

< 35

CIG 35 to 50 of intermediate plasticity

CHG 50 to 70 of high plasticity

CVG 70 to 90 of very high plasticity

CEG of extremely high plasticity

> 90

SILT and CLAYS 65% to
100% ines

Sandy SILT MS MLS, etc Sandy SILT; subdivide as for CG

FS

Sandy CLAY CS CLS, etc Sandy CLAY; subdivide as for CG

SILT (M-SOIL) M ML, etc SILT, subdivide as for C

F

CLAY C CL CLAY of low plasticity

< 35

CI 35 to 50 of intermediate plasticity

CH 50 to 70 of high plasticity

CV 70 to 90 of very high plasticity

CE of extremely high plasticity

> 90

ORGANIC SOILS Descriptive letter 'O' sufixed to organic matter suspected to be a signiicant constituent. Example MHO: any group

or sub-group symbol. Organic SILT of high plasticity.

PEAT Pt Peat soils consist predominantly of plant remains which may be ibrous or amorphous.