1916] 



Bickerson: Tejon Eocene of California 



437 



cene and Pleistocene terrace deposits. San Diego city is built upon two 

 or three marine terraces and the upper terrace, about 400 feet above 

 the sea, extends northward for many miles. Soledad Mountain, 

 which is five or six miles northwest of San Diego, rises above this 

 terrace, or rather the terrace encircles the mountain. The Tejon is 

 best exposed in the stream canons east of Soledad Mountain which 

 have trenched the marine terraces. Rose Canon and Tecolote Creek 

 yield particularly good sections. 



The Tejon group in the vicinity of San Diego and La Jolla con- 

 sists of about 600-700 feet of nearly horizontal strata which underlie 

 most of the "mesa" land around San Diego and La Jolla. These 

 strata consist of beds of clay shale containing nodular limestone and 

 dull red quartzose sandstone typical of the Tejon group throughout 

 the state. One prominent fossiliferous horizon is found about 200 

 feet above the base. This horizon occurs in Rose Canon, Tecolote 

 Valley and in other valleys of the vicinity. 



FAUNA 



The fauna upon which this discussion is based was obtained 

 principally by W. S. W. Kew. The writer spent three or four days 

 in the field with Mr. Kew in the summer of 1913. Chester Stock 

 and Earl L. Packard also contributed to the collections from this 

 vicinity. Most of the specimens were obtained from the fossiliferous 

 horizon which is estimated as 200 feet above the base of the formation. 

 The collection obtained by Mr. Kew from Point Loma, University of 

 California locality 695, was near the base of the Tejon. 



List of Tejon Fossils From Localities in and Around San Diego 



Type 



694 695 696 697 2226 Tejon. 



Turbinolia, sp x x .... 



Astarte semidentata Cooper x x .... 



Acila gabbiana, n. sp x x x 



Avicula pellucida Gabb x x 



Barbatia morsei Gabb x .... x 



Corbula parilis Gabb x x x x 



Cardium cooperii Gabb x .... x .... x x 



Cardium brewerii Gabb x .... x x .... x 



Crassatellites grandis Gabb x x 



Cardium, sp x .... 



Glycimeris sagittatus Gabb x x x 



Isocardium tejonensis Waring x x 



Lucina gyrata (Gabb) x x x 



Lucina diegoensis, n. sp x 



