FIGURE 3 









• 































• FLORIDA AND GULF OF MEXICO BEACHES 

 ■ NEW ENGLAND BEACHES 



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-1.0 

 2.0 







+ 0.5 



+ 1.0 



+ 1.5 



+20 



+ 2.5 



+ 3.0 



+3.5 PHI UNITS 



1.0 





0.5 

 MEDIAN 



DIAMETER 



025 





0.125 



mm. 



PHI DEVIATION COMPARED TO GRAIN SIZE. PHI DEVIATION IS 

 ANALOGOUS TO STANDARD DEVIATION WITH THE MOST 

 UNIFORM SEDIMENTS HAVING THE SMALLEST VALUES. 



36 



