THE OCEAN AND ITS WORK 



219 



slight recesses of the coast, where the littoral currents deposit their 

 load. Such beaches are crescent-shaped. Near the base of a sea cliff 

 bowlders or coarse gravel will be found, but as one goes from the cliff 



K 



Fig. 210. — A bayhead beach. Conception Bay, Newfoundland. (U. S. Geol. Surv.) 



the material of the beach is seen to become pebbly and finally to 

 consist of fine sand. The horizontal distance over which a pebble 

 travels before it is ground to sand is very short. 



Bayhead Beaches. — The detritus worn by the waves from the 

 cliffs and from the 

 bottom where the 

 water is shallow, and 

 that brought to the 

 sea by streams is in 

 part carried into deep 

 water, where it is im- 

 mediately deposited 

 and, in part, is swept 

 along the beach by 



Shore or littoral cur- p IG> 2 n. — Lagoon inclosed by a storm ridge. 



rents. As the waste (Photo. De Martonne.) 



