UNIVERSITY OF CALIFORNIA 



Bulletin of the Department of Geology 



Vol.2, No. 5, pp. 119-153 PI. 4 ANDREW C. LAWSON, Editor 



THE 



GEOLOGY OF POINT REYES PENINSULA 



BY 



F. M. Anderson 

 CONTENTS. 



Page. 



Introduction — 



General Statement 120 



Boundaries 121 



Literature 121 



Granite 122 



Areas 1 22 



Petrographic Character 124 



Btidomorphism of the Granite.. 128 



Relation to Other Massifs 128 



Pre-granitic Crust 130 



Marble 131 



Quartzite 131 



Crystalline Schists 132 



Age of Pre-granitic Series 132 



Later Sedimentary Rocks 133 



Franciscan Series 133 



Miocene Sediments 134 



Petrographic Character 138 



Origin of the Shales 138 



Terrace Formations 141 



Recent Sands 141 



Overwash Gravels 142 



Geology of the Farallone Islands 142 



Structure , .< 143 



Crust Block 143 



Faults 143 



Geomorphy — 



Main Ridges 146 



Terraces 147 



Shore-lines 147 



Submarine Topography i48 



Drainage 148 



