UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 9, No. 15, pp. 215-259 Issued February 29, 1916 



THE PLIOCENE OF MIDDLE AND NORTHERN 



CALIFORNIA 



BY 



BRUCE MARTIN 



CONTENTS 



PAGE 



Introduction 215 



Review of the Literature 216 



Merced Series 222 



Merced of the Type Locality 223 



Merced of Bolinas Bay 230 



Merced of Aiio Nuevo Bay 230 



Merced of Pillar Point 231 



Merced of the Sargent Oil Field 232 



Merced of the Santa Rosa Valley 233 



Wildcat Series 234 



Physical Features 234 



Fauna 235 



Upper Miocene of Bear River 240 



Purisima Formation 241 



Etchegoin of the Sargent Oil Field 244 



Later Neocene and Quarternary Deposits of Cape Blanco, Oregon 245 



Correlation 247 



Introduction 



"Within the past two years the writer has examined a number 

 of the Pliocene formations of California for the purpose of bringing 

 together a more complete fauna than had heretofore been obtained, 

 hoping also to throw some light on the faunal relations of the 

 formations, and to make possible a more exact correlation of the 

 beds concerned. It is the purpose of this paper to give the results 

 obtained in this investigation. The formations included in the 

 examination are : the Merced Series at Seven Mile Beach, San 

 Mateo County, and at several other localities to the north and to 



