GW: Well-Graded Gravel, Fine To Coarse Gravel
GP: Poorly Graded Gravel
GM: Silty Gravel
GC: Clayey Gravel
SW: Well-Graded Sand, Fine to Coarse Sand
SP: Poorly Graded Sand
SM: Silty Sand
SC: Clayey Sand
ML: Silt
CL: Clay of Low Plasticity, Lean Clay
OL: Organic Silt, Organic Clay
MH: Silt of High Plasticity, Elastic Clay
CH: Clay of High Plasticity, Fat Clay
OH: Organic Clay, Organic Silt
Pt: Peat
