PHYSICAL GEOGRAPHY 99 



THE CATALINA GROUP 



The Catalina Group consists of four northwest- 

 southeast ranges, separated from one another by 

 deep, valley-hke troughs. Santa Catalina projects as 

 a tip of land from the easternmost of these ; San Cle- 

 mente is the second one to the west; Santa Barbara 

 forms the third one ; while the fourth one closely par- 

 allels the top of the Abyssal Escarpment, but no- 

 where comes to the surface. 



The ridges from which the Catalina group of islands 

 rise, and the valleys which lie between them extend 

 in west of north directions in harmony with the gen- 

 eral direction of the San Diego Coast and the strike of 

 the first group of northwesterly faults. They have all 

 the aspects of true mountain ranges and inter-moun- 

 tain valleys which were perhaps at one time above sea 

 level. The trends of these ridges and valleys are also 

 those of the Coast Ranges of Northern California. 

 They extend a little to the west of the latter when 

 projected upon the map. 



THE ANACAPA RANGE 



The Anacapa Range consists of the east-west line 

 of islands which extends due west from the west end 

 of the Santa Monica Range, of which they are a for- 

 mer geographic extension. 



The Anacapa Group (also sometimes called the Santa 

 Rosa Island Group in this paper) are popularily known 

 as the Channel Islands. These rise to the north of a 

 great submarine fault scarp of east-west directions, 

 and are an integral part of the mountains of the 

 Transverse Structural Belt, already described. They 



