294 B. L. CLARK THE MEGANOS GROUP 



Cretaceous bore holes wMcli are filled with sands of the overlying stratum. 

 The unconformity reported is at least not of the same order as the uncon- 

 formity between the Tejon and Martinez, as the structural and faunal break 

 between these two groups is a great one. A very large number of Martinez 

 species failed to bridge the gap. Such is not the case in the A^icinity of Do- 

 mangine Creek. The writer believes that the time break represented by this 

 unconformity is at most of secondary order — that is, such as might separate 

 two formations in a group." 



After studying the fauna from the Tiirritella andersoni beds, the same 

 material on which Dickerson based his conclusions, the writer was im- 

 l^ressed with the fact that there are, in this fauna, so few typical Tejon 

 species. He does not agree with a number of the specific determinations 

 that Dickerson made, as given in his list from locality 1817. Evidently 

 Dickerson did not consider the possibility of there being a third group 

 coming in between the Martinez and the Tejon, and that if this were so 

 one might well expect to find a larger number of species bridging the gap 

 between this intermediate horizon and the Tejon than the gap between 

 the Martinez and the Tejon. While the paleontological evidence for the 

 correlation of the Turritella andersoni beds with the Meganos epoch of 

 deposition may possibly not be the best at the present time, yet the strati- 

 graphic evidence, together with the difference between the fauna of the 

 Turritella andersoni beds and that of the Tejon above, makes it highly 

 probable that here we are dealing with the same epoch of deposition as 

 that to which the Meganos beds belong. 



EOCENE OF CALABASIS QUADRANGLE, VENTURA COUNTY 



C. A. Waring,^* in a recent publication, has described the Eocene of 

 the Calabasis quadrangle. Waring has divided this series in this area 

 into the Martinez and the Tejon. It is stated that apparently the Marti- 

 nez in this area grades up into the Tejon, the division between the two 

 being entirely based on paleontological evidence. The fauna from these 

 so-called Tejon beds, as he has listed and illustrated it, undoubtably be- 

 longs to the same epoch of deposition as the Turritella andersoni beds to 

 the north of Coalinga. 



It is interesting to note that several of the species in the so-called Tejon 

 fauna, listed and figured by Waring, are apparently identical with certain 

 of the new species or new subspecies in the ]\Ieganos beds of the Mount 

 Diablo region. This is also true of several of the so-called Martinez spe- 

 cies. One of the most striking examples is the fact that one of Waring's 



1* C. A. Waring : Stratigraphic and faunal relations of the Martinez to the Chico and 

 Tejon of southern California. Proc. California Acad. Sci., 4th ser., vol. vii, no. 4, 1917, 

 pp. 41-124, pis. 7-16. 



