860 



GEOLOGY. 



bar may also join a beach or barrier. Traced back to its source, the 

 beach from which a spit leads out is often found to terminate in the cliff 

 from which the material of the beach and the spit were derived (PL XX 

 and Fig. 2, PL XXII). In such cases the sediment of the beach has 



MAP or' 

 SHORE TERRACES 



JTear Dove Creek.TJlah. 

 "Bjr Gilbert Tliompsoit^ 



tO-Fet£ fantours . 



Fig. 318. — Map of shore-terraces, largely wave-built. Lake Bonneville. (Gilbert.) 



