i8o 



University of California. 



[Vol. 2. 



as indicated by the topography of the islands and neighboring 

 mainland. 



Grouping of the Islands. — These islands, which range in length 

 from a fraction of a mile to nearly twenty-five miles, fall geograph- 

 ically into two groups, a northern and a southern. To the former 

 belong the islands of San Miguel, Santa Rosa, Santa Cruz, and 

 Anacapa, lying in a nearly straight line and separated from each 

 other by only narrow channels, and from the mainland by the 

 Santa Barbara Channel. The islands of the southern group are 

 San Clemente, Santa Catalina, Santa Barbara, and San Nicolas, with 

 Begg's Rock, which stands in the relation of a very distant off-shore 



415 



its 807 



-'e*3 



Tavne> Ban*. 18 \ 



'-. 53 



: ss : 



SI U \ 



\ 41 Cortts Bank 30 \}«? 

 ,0 „ ">\ 



s 5"tf -Bishop K'otft 



' <cl5 



7W 



St-amrr- Mil*«s 



Figure 1.— Cortes Bank and Tanner Bank, former islands, truncated by wave cutting in post- 

 Pliocene times. The soundings are in fathoms. 



