UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



VoL 12, No, 7, pp. 431-473, 19 text figs. January 11, 1921 



THE MOBILITY OF THE COAST RANGES OF 

 CALIFORNIA 



AN EXPLOITATION OF THE ELASTIC REBOUND THEORY 



BY 



ANDEEW C. LAWSON 



CONTENTS 



PAGE 



Introduction 432 



Basis of hypothesis of causal stress 435 



Possibilities of transverse shift 440 



Longitudinal and transverse strain 443 



Region north of the Golden Gate 445 



Tamalpais 445 



Chaparral 446 



Ross Mountain 447 



Sonoma 447 



Farallon 448 



Tabulation of results 449 



Tomales Bay group 450 



Fort Ross group 454 



Point Arena group 456 



Region south of the Golden Gate 458 



The movement of 1868 459 



Summary statement of displacements 460 



Rocky Mound 461 



Red Hill : 462 



Loma Prieta 464 



Gradient of displacement 464 



Black Mountain 465 



Pulgas West Base ; 466 



Sierra Morena 466 



Mt. Toro 466 



Gavilan 467 



Santa Cruz and Point Pinos 468 



Colma group : 468 



Apparent distension 469 



Summary 471 



