1916] 



Dickersan: Tejon Eocene of California 



375 



rence here, taken together with other evidence, proves that this ref- 

 erence is incorrect. 



The second bluff sandstone of one to two hundred feet overlies 

 the thin-bedded sandstones and carbonaceous shales. It is for the 

 most part non-fossiliferous. In sandstone about one hundred feet 

 above, was obtained a fauna which is similar to that of the first bluff 

 sandstone. The similarity in fauna of these two horizons indicates 

 that the time represented by the seven hundred feet of alternating 

 shales and sandstones and minor unconformities between some of 

 the beds was comparatively short. 



Separated from the second bluff by alternating shales and sand- 

 stones is the third bluff, consisting of a massive tan rock, weathering 

 in a manner similar to that of the other, but giving outcrops not 

 quite so prominent. This bluff is 550 feet thick and non-fossilif- 

 erous in the eastern end but two or three collecting localities occur 

 in equivalent strata in the western portion. These thr^e bluffs and 

 the intervening strata seem to contain but one fauna, and on this 

 account this great thickness is included in the Rimella simplex zone. 

 Furthermore, similar conditions are found north of Coalinga and 

 at the type locality of the Tejon. 



The lists on pp. 376-377 contain the species which have been found 

 in the Rimella simplex zone south of Mount Diablo : 



This fauna contains most of the species common in the Tejon. 

 It is characterized by the presence of Rimella simpler Gabb, Veneri- 

 cardiei planicosta homii, Turritella uvasanei, Crassatellites uvasana, 

 Conns remondii, Whitneya ficus, and many other forms which are 

 abundant at the type locality of the Tejon. Apparently the same 

 faunal stage is present in both places. 



Balanophyllia Variabilis Zone 



The remainder of the Tejon may be grouped as alternations of 

 carbonaceous shales and fine-grained sandstones. Within this upper 

 horizon, extending from 400 to 800 feet below the Monterey con- 

 tact, are found abundantly fossiliferous strata having for their most 

 characteristic fossil the coral Balanophyllia variabilis Nomland, 

 which is associated here with Schizaster lecontei and Cardhtm cooperii. 

 This zone appears to be somewhat lower than the uppermost Eocene 

 of the Marysville Buttes region. Some of these strata were deposited 

 in moderately deep water, although carbonaceous deposits found just 



