BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 11, PP. 417-432, PLS. 25-29 JUNE 15, 1900 



SOME COAST MIGRATIONS, SANTA LUCIA RANGE, 



CALIFORNIA 



BY BAILEY WILLIS 



{Read before the Society December 27, and before the Cordilleran Section 



December 29, 1899) 



CONTENTS 



Page 



Introductory note 417 



The present scene , 418 



Pre- Franciscan history 419 



Coast complex ' 419 



Pre-Franciscan erosion 419 



Franciscan history 420 



Franciscan stratigraphy 420 



Franciscan geographic conditions 420 



Nature of deformation 420 



Post- Franciscan history 421 



Cretaceous land 421 



Miocene (?) stratigraphy 422 



Geographic conditions of the Miocene (?) 422 



Relation of the Miocene (?) and Miocene strata 423 



Pine Mountain section ; Franciscan to Pliocene 424 



Pliocene to present , 425 



Physiography of the coastal slope 425 



Three types of coastal slopes 427 



Incidents in the scarp-growth. 429 



Summary 430 



Explanation of figure 2 431 



Introductory Note 



The following article presents observations made during a trip from 

 Monterey to San Luis Obispo along the intervening Coast ranges. I was 

 accompanied by Doctor H. W. Fairbanks, in whose articles many of the 

 facts herein presented have already been published,* and I am indebted 

 to him not only for pointing out the most interesting and significant 



* Stratigraphy of Slate Springs. Amer. Geologist, vol. xviii, 1896. 

 LX— Bull. Geol. Sog. Am., Vol. 11, 1899 (417) 



