Skewness

classification

1 > Sk > 0.3

very asymmetrical sands towards the ends

0.3 > Sk > 0.1

Asymmetrical towards the ends

0.1 > Sk > −0.1

Almost asymmetrical

−0.1 > Sk > −0.3

Asymmetric towards coarse

−0.3 > Sk > −1

Very asymmetrical towards the coarse