80 SOUTHERN CALIFORNIA GEOLOGY 



structural features of Northern and Southern Cali- 

 fornia, including the Tehachapi, San Rafael, Santa 

 Ynez, Topa-topa, and San Gabriel Ranges. Besides 

 these, there are several large, unconnected highlands, 

 such as the Fraser, Alamos and Pine Mountains. Sev- 

 eral of the great master faults, the Santa Ynez, San 

 Andreas, Tehachapi (Garlock) and perhaps others meet 

 here and cross, or join one another. The western end 

 of this district is dominated partially by the east- 

 west trends and structures adjusted to what may be 

 a continuous line of the east-west Santa Ynez and 

 Bouquet Canyon faults, which separates the southern 

 ends of the Coast Range features on the north from 

 those of the northwest extending belts to the south. 



THE SANTA YNEZ RANGE 

 This long, narrow, east-west-extending range paral- 

 lels and overlooks the coast of Ventura and Santa Bar- 

 bara counties, and is crossed by the State Highway 

 through Gaviota Pass. It is practically an elongated 

 fold of Cretaceous and Tertiary strata, and it is 

 bordered on its north side by one of the Santa Ynez 

 faults — one of the master rifts of California, which is 

 closely followed by the valley of the Santa Clara River 

 for an indefinite distance eastward to the San Andreas 

 Rift southwest of Lancaster. Gaviota Peak is the 

 highest summit — the peak which was first asserted to 

 have moved northward twenty-four feet in thirty 

 years, and later four and one-half feet southeastward. 



THE VENTURA RANGES 

 Of the many geographic and geologic phenomena 

 of Southern California the flexured Ventura Ranges 

 in western Los Angeles and Ventura Counties are 



