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University of California. 



[Vol. 2. 



terraced at an altitude of about 300 feet. Yates* speaks of finding 

 rolled pebbles "on the table-land of Middle Island" and also at one 

 point on Western Anacapa. As Santa Cruz and Anacapa are 

 without doubt genetically parts of the same mass, it is probable 

 that the movements indicated by the terracing of Anacapa were 

 participated in by Santa Cruz. 



The northern slopes of Anacapa are not marked by definite 

 channels, except on the western island. Here there are several 

 apparently shallow channels, one of which has a corresponding 

 notch in the shore contour. 



Santa Barbara has an area of about a square mile, and is 

 roughly triangular in shape, with the base of the triangle toward 

 the east. Parallel to this base, and about midway between base 

 and apex, is the saddle-shaped main axis, from which the surface 

 slopes gently to the east and west. The island is surrounded by 

 cliffs, which reach their maximum height where they cut across 

 the main axis. The eastern slopes are marked by a few small and 

 shallow channels, but none are shown on the west. Cooper f states 

 that this island shows three or four imperfect terraces. He men- 

 tions one in particular, on the eastern side, at an elevation of 

 thirty feet, on which shells are found. This terrace is shown on 

 the map as a narrow shelf at an elevation of forty feet (by the 

 nearest contour). Other terracing, not so definite, is shown both 

 on the west and on the east, at elevations of 180 feet and about 

 280 feet. Santa Barbara is 547 feet in altitude, and, according to 

 the same authority, is composed of volcanic rocks. 



Submarine Feattires. — Bordering the entire length of the Cali- 

 fornia coast and closely following its general configuration, is a com- 

 paratively narrow submarine platform or terrace, with very gentle 

 outward slopes, and its outer margin, in general, marked approxi- 

 mately by the 600-foot submarine contour. From the outer edge 

 of this platform the descent to oceanic depths is at a greatly 

 increased, though by no means uniform angle. This platform not 

 only follows the general outline of the main coast, but is found 

 surrounding all the islands of southern California. Its width is 



*Loc. cit, pp. 172, 173. 

 fLoc. cit., p. 183. 



