UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 8, No. 22, pp. 385-572, pis. 42-71 Issued August 30, 1915 



FAUNA OF THE SAN PABLO GROUP OF 

 MIDDLE CALIFORNIA 



BY 



BEUCE L. CLAEK 



CONTENTS 



PAGE 



Introduction and Acknowledgments 388 



Historical Review 389 



Geographic Occurrence of the San Pablo Group 393 



The Stratigraphic Position and General Characters of the San Pablo Group 



in Middle California 395 



Description of Sections 396 



San Pablo Bay 1 396 



Stratigraphy and Lithology 396 



Lithology of Section 397 



Relation to Monterey Group 398 



Relation to Pinole Tuff 399 



Detailed Section of the San Pablo Group as Measured on the North 



Side of the San Pablo Bay Syncline 399 



Fauna .*. 400 



Division A 400 



Division B 401 



Faunal List facing 400 



North Side of Mount Diablo 402 



Stratigraphy and Lithology 402 



Fauna 402 



Faunal List 404 



South Side of Mount Diablo 406 



Stratigraphy and Lithology 406 



Lithology 406 



Relation to Monterey Group 408 



Relation to Pinole Tuff and Orindan 408 



Detailed Section of the San Pablo Group as Measured in the Vicinity 

 of Tassajero Creek 408 



