•0.4 



•0.6 



-0.8- 



' I I ■ ■ ■ ■ I ' ■ ■ 



Very Positive 

 Skewed 



Positive 

 Skewed 



Nearly 

 Symmetrical 



Negative 

 Skewed 



-2 



10 



M 



Figure 5.— Phi Mean Size (M,) versus Skewness (Sk^) plots of sediments. Data for the delta coastal beach and the Colville River 



environments were taken from Dygas et al. (1971). 



267 



