5.0 



4.0 



3.0 

 2.5 



2.0 



1.5 



1.2 



1.0 



°n 0.9 

 0.8 

 0.7 

 0.6 

 0.5 

 0.4 



0.3 



Quadrant 2 



Quadrant 3 



^_j i -j— 



Ti — i 

 s\\\A. 



* ggsg^"d tT 7 ". 



STABLE 



Q2 l • > > > I I » ' ' I i l i l I l l l l I i I l I I l l i l I I I I I I I I I I 



-4 -3-2-101234 



Figure 7. Isolines of SPM fill factor (%) versus phi mean difference 

 and phi sorting ratio (from James, 1975). 



31 



