Sand Beaches 



189 



«f^- 



2100; C, layer of coarser gravel, 0030 on June 27; D, complete cusp, 0730. 



pies to reveal relationship to environment is 

 exhibited at Newport Beach (Fig. 164) where 

 fine-grained sand exists in equilibrium with 

 the small waves that result from refraction 

 away from the deep water at the head of 

 Newport Canyon; in contrast, sand at both 

 sides of the point where the waves are higher 



is coarser. Similar results were obtained 

 here in summer and winter. 



Variations in grain size also occur trans- 

 verse to the beach. On coarse beaches it is 

 common that the coarsest sand is present at 

 the low-tide level where the wave turbulence 

 is greatest; however, some fine-sand beaches 



