304 GEOLOGY 



The height of the cliff depends on the height of the land on 

 which the sea is advancing. Its slope may be steep or gentle (Figs. 

 247 and 248), according to the nature of the material of which it 



Fig. 249. A high sea cliff, La Jolla, Cal. 



Fig. 250. A high cliff with a beach, shore of Lake Michigan. (U. S. Geol. 



Surv.) 



