GEOLOGIC TIME SCALE FOR THE PACIFIC COAST 





Generalized Section of 

 Coast Rangea of 

 California 



Mt. Diablo Region 

 San Francisco Bay 



Santa Cruz Mts. 



Coalinga District 



Salinas Valley-Parkfield 

 District 



Santa Maria District 



Los Angeles-Ventura 

 District 



Generalized Section of 

 Coast Ranges, 

 of Oregon and Washington 



Pleistocene 



Upper San Pedro 



Rodeo formation 





Terrace 



Terrace 

 Paso Robles 



Terrace 



Terrace 





Pliocene 



Upper 

 Merced 



Lower 

 Merced 



San Pedro 

 Pliocene 

 San Diego 

 formation 

 ? 



Upper 

 Etchegoin 

 — Fernando 



Campan 

 formation 



Santa Clara 

 formation 



Tulare formation 



Fernando 



Upper Fernando 



Merced 

 Empire 

 Wildcat series 

 Montesano 





Upper Etchegoin 



Upper Etchegoin 



Siestan formation 

 Pinole tuff 

 Orinda formation 



Merced 

 Purisima 



Lower Fernando 



Modelo (Puente) 

 formation 



Lower Etchegoin 

 (Jacalitos) 



Lower Etchegoin 

 (Jacalitos) 



Lower Etchegoin 

 (Jacalitos) 



Monterey group 



Upper 

 Miocene 



San Pablo group 



Briones 

 formation 



San Pablo group 



Briones 

 formation 



"Santa Margarita" 

 formation 



"Santa Margarita" 

 formation 



"Santa Margarita" 

 formation 



"Santa Margarita" 

 formation 











LOWEK 



Miocene 



Monterey group 

 (Turritella ocoyana) 



Monterey group 



Monterey shale 







Monterey group 



Salinas shale 



Monterey shale 



(Turritella ocoyana) 



(Turritella ocoyana) 





Vaqueros 



(Turritella ineziana) 





Vaqueros 





Vaqueros 



Vaqueros 



Vaqueros 



(TuiTitella ineziana) 



Oligocene 



Sespe 

 formation 







Sespe 

 formation 



Sespe 

 formation 



San Lorenzo series 



San Lorenzo series 

 Kirker formation 

 San Ramon 

 formation 

 Markley formation 



San Lorenzo 

 Butano sandstone 



Kreyenhagon 

 shale 





Tejon group 



San Lorenzo series 



Eocene 



Tejon group 



Tejon group 



Eocene 



Tejon group 



KnoxvUle and 

 Chico rocks 



Franciscan 

 series 



Tejon group 



Tejon group 

 Meganos gi'oup 



Meganos group 



Meganos group 



Meganos group 





Meganos group 



Martinez group 



Martinez group 



Martinez group 



Martinez group 



Cretaceous 



Chico 



Horsetown 



KnoxviUe 



Chico 



Chico 



Chico group 



Chico? 



Chico group 



Chico 



Knoxville 



Knoxville 





Knoxville 





Knoxville 



Jurassic (?) 



Franciscan 

 series 



Franciscan 

 series 



Franciscan 

 series 



Franciscan 

 series 



Franciscan 

 series 





Franciscan (?) 

 series 



Granites and 

 Metamorphics 









Granites and 

 Metamorphics 





Granites and 

 Metamorphics 





