Beds as a Division of the California Cretaceous. 477 



The Miocene is not positively recognized near San Diego, 

 but the mesas along the eastern side of the bay on which the 

 city is situated are filled with Pliocene fossils ; the strata being 

 separated from the Chico-Tejon by a small non-conformity. 



As has been mentioned before, the rocks dip south on the 

 north side of False Bay. The angle is small but quite uniform 

 until La Jolla is reached when for a short distance it becomes 

 much greater, then just north of the town where a shallow bay 

 indents the land, there is quite an abrupt reversal of the dip 

 toward the northeast, the angle being as much as 30 degrees. 

 The northern side of this anticlinal is exposed along the shore 

 for a half a mile. The rock is chiefly shale with some heavy 

 bedded sandstones, and contains a fauna somewhat similar to 

 that on Point Loma save that it is not as varied. The follow- 

 ing species were determined. 



Hamites vancouverensis. Cinulia obliqua. 



Helcion dichotoma. Gryphaea vesicularis. 



Inoceramus vancouverensis. Pecten traski. 



Megertia ? Terebratula n. s. 



Mytilus pauperculus. Septifer dichotomus. 



Pecten n. s. Solen parallelus. 



Stomatia n. s. Coralliochama orcutti. 



Ammonites hoffmani. Baclites chicoensis. 

 Axinaea veatchi. 

 Chione varians. 



At both Pt. Loma and La Jolla the fossiliferous Cretaceous 

 strata appear only at the highest point in the anticlinal. 



A little valley opens out to ocean north of the Cretaceous 

 strata just described and no outcrops appear for nearly a mile. 

 North of the valley there begins a long stretch of perpendicu- 

 lar cliffs rising nearly four hundred feet. The strata have the 

 same dip and strike as those forming the northern side of the 

 anticlinal at La Jolla. At the base are a few Eocene fossils 

 which become more abundant northward along the coast, that 

 is higher in the series. No contact of the Eocene with the 

 Chico is shown but there is apparently a conformability. 



The conclusion to be drawn from these facts warrants the 

 assumption that the Coralliochama is a distinctly Chico fossil 

 in the three known localities on the southern coast, namely : — 

 Todos Santos bay, Pt. Loma and La Jolla, and though there 

 are no stratigraphical relations shown near Wallala, yet the 

 general character of the beds and the resemblance of the fauna 

 to that of the localities just described, leads me to the belief 

 that they are all approximately synchronous. It will be seen 

 on comparison of the list of fossils that about half of those 

 from Todos Santos were found at Pt. Loma and La Jolla, while 



