CONTENTS. 
PARTE 1. 
PREFACE . 
INTRODUCTION . 
GEOLOGY OF THE Coast SystEM oF MoUNTAINS 
Definitions 
Geological History 
Structure 
Marginal Fe pedia Granitie Rosks Folds, Faults 
Geomorphic Features 
THE San AnpDREAS RIFT AS A ee FEATURE 
General 
Humboldt Seon 
Point Arena to Fort Ross . 
Bodega Head to Bolinas Bay 
General Note, Characteristics of ie Rift 
Mussel Rock to Pajaro River 
Pajaro River to the North End of ihe Colorndy Demre 
San Jacinto Fault 
Review of Salient Features 
THE EArtH MOVEMENT ON THE FAULT oF ApriL 18, 1906 
The Fault-trace . 
Humboldt County 
Point Arena to Fort Ross . 
Fort Ross . 
Bodega Head to Tomales Bay 
Tomales Bay to Bolinas Lagoon 
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The Fault-trace, Measurements of ito: Muvoment otcoay to the Wadie-plane, 
Earlier Fault-traces, Cracks, Springs, Interpretation of Bedrock Cracks and Springs, 
Landslides, Ridging and Shifting of the Tide Lands : 
The Question of Local Elevation and Depression of Land . 
66-77 
80 
Introductory, About Bolinas Lagoon, About Tomales Bay, Bodega ‘Haye aratiary, 
Postscript, Second Postscript . 
Report on a Biological Reconnaissance of Bodega Hay, by W sitar E. Ritter 
Report on a Biological Reconnaissance of Tomales Bay, by Charles A. Kofoid . 
Report on a Biological Reconnaissance of the Bolinas Lagoon Region, by Charles A. Kofoid 90 
Bolinas Lagoon, The Seacoast Line, The Clam Patch . 
Report on a Reconnaissance of Tomales Bay, by R. S. Holway . 
90 
91 
Report on an Examination of Plants on Pepper Island, Bolinas Lagoon, by W. 1 Jepson 91 
Mussel Rock to Crystal Springs Lake 
92 
Course of the Fault-trace, Characteristics of the Fault- trace, ,, Offsets on Tah de: Pipes, 
Dams, etc., Exposures of the Fault-plane, Vertical Movement . 
Crystal Springs Lake to Congress Springs 
92-103 
104 
Summary Statement, Crystal Springs Lake to Portola, Road from Judge Allen’s 
Southward, Alpine Road, Black Mountain, Page Mill Road, Stevens Creek, South of 
Congress Springs. 
104-109 
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