1913] Louderback: The Monterey Series 223 



[ Formation 





I '1 i ocene 





Merced 



Sandstones of Lake Merced with 

 Cardium meekanum and Scutella 

 interlineata 





San Diego 



Purisima 



Sandstones of San Di- 

 ego and Half Moon 

 Bay with Pecten 

 healeyi 





Upper 



San Pablo 



Sandstones of San Pablo Bay and 

 the Coalinga region, with Pecten 

 pabloensis and Pecten oweni 



Miocene 



Middle 



Santa 



Margarita 



Sandstones of Salinas Valley, with 

 Pecten estrellanus, Ostrea titan, 

 and Taniiosoma gregaria 





Monterey 



Monterey Shales with Pecten discus 

 and Pecten peckhami 





Lower 



Vaqueros 



Sandstones of Monterey and San 

 Luis Obispo counties, with Tur- 

 ritella inezana and Mytilus ma- 

 thewsoni 



Oligocene 





Astoria 



San Lorenzo 



Sandstones and shales 

 of Santa Cruz County 



Eocene 



Claiborne 



Te.jon 



Sandstones of Ft. Tejon, Martinez, 

 and Merced Falls with Veneri- 

 cardia planicosta 





Midway 



Martinez 



Sandstones of Martinez with Pho- 

 ladomya nasuta 



In a later table 73 he gives the faunal zones, and their occur- 

 rence at various localities. He recognizes a lower "Vaqueros" 

 zone ("zone of Pecten magnolia and Tvrritella inezana"), and 

 an upper "Vaqueros" zone ("zone of Agasoma and Pecten an- 

 dersoni") , including the Turritella ocoyana zone and the Temlor 

 beds of the interior districts. 



Throughout runs the fallacy that the Monterey and Vaqueros 

 each represent a definite time interval and a life-time zone. The 

 untenability of some of the division lines here given has already 

 been discussed, some of the others will be taken up later. 



Sargent Oil Field, Jones, 19U.—Eavly in 1911 W. F. Jones 

 published a description of "The Geology of the Sargent Oil 

 Field" 74 at the southeastern end of the Santa Cruz Mountains 



73 Not numbered, but just in front of p. 226. 



™ Univ. Calif. Publ. Bull. Dept. Geol., vol. 6, no. 3, pp. 55-78, Feb. 18, 



