]PROCKEDINGS 



OF THB 



CALIFORNIA ACADEMY OF SCIENCES 



Third Series 

 Geology Vol. II, No. 2 



Issued December 4, igo^ 



A STRATIGRAPHIC STUDY IN THE MOUNT DIABLO 

 RANGE OF CALIFORNIA 



BY FRANK M. ANDERSON 

 Curator of the Department of Invertebrate Paleontology 



CONTENTS 



Plates'XIII-XXXV p^^^ 



Preface 156 



Introduction 157 



Divisions of the Mount Diablo Range 158 



Stratigraphic Series 159 



Franciscan and Associated Rocks 159 



Cretaceous Strata 160 



Eocene Formations 162 



Miocene Formations 168 



Later Neocene Beds 173 



Coalinga Beds 174 



Etch egom Beds 178 



Etchegoin Sands 178 



San foaquin Clays 181 



Tulare Formation 181 



Stratigraphic Relations 182 



Other Occurrences of Lower Miocene within the Interior 



Basin 186 



San Emidio Section 186 



Beds of the Carisa Ranch 186 



Kern River Beds 187 



Correlations 188 



Conclusions 190 



Descriptions of Species 191 



[i] November 2S, 1905 



