56 



V: 



niversity of California Publications. 



[Geology 



page 



Economic Features 



75 

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 78 



Oil 



Cement Materials 



Limestones 



Shale 



Clay 



Stone 

 Sand 



INTRODUCTION. 



The area to be discussed in this paper embraces the south- 

 eastern end of the Santa Cruz Mountains where they merge 

 into the Santa Clara and San Benito valleys. The area covered 

 by the map embraces the southeastern corner of Santa Cruz 

 County, part of Santa Clara County, and a narrow strip of 

 San Benito County south of the Pajaro River. 



The selection of this region for study was influenced by the 

 many facilities offered by Mr. J. C. Kemp van Ee, to whom the 

 writer is much indebted. Through the kindness of the Watson- 

 ville Oil Company a topographic map was procured which 

 served as a base for detailed field work. Reconnaissance work 

 was carried on outside the mapped area when necessary. Some 

 of the facts brought out by the field work are thought to be of 

 sufficient importance and interest to be worthy of publication. 



The writer wishes to express his thanks to Mr. J. C. Kemp 

 van Ee for his interest and aid in the work, to the Watsonville 

 Oil Company for the use of the unusually good topographic 

 map and the logs of the oil wells on the Sargent ranch, to 

 Professor Andrew C. Lawson for very material aid in the field 

 and in the laboratory, and to Mr. C. A. Mitchell, foreman of the 

 Watsonville Oil Company's wells, for his cooperation. 



The general physiographic features of the Santa Cruz 

 Mountains are well known. The most striking feature, perhaps, 

 is the dominant northwest-southeast trend of the ridges and 

 valleys. The only exception to this generality is the valley of 

 the Pajaro River which trends almost due east and west in 



PHYSIOGRAPHIC FEATURES. 



