5000 feet 



100 



80 - 



60 



40 - 



20 



T-ri — I — I r 



A B C 



D E F 



III' 



1 



J L 



I 0.5 



GRAIN 



0.2 

 SIZE 



0.1 0.05 mm 



Figure 11. Cumulative distribution of grain size in the sediments from the 

 mouth to the head of Barnstable Harbor and marsh (Redfield 1972). Coarser 

 materials drop out quickly as currents slow inside the barrier spit. 



16 



