Vol. VII] WARING— STRATIGRAFHIC AND FAUNAL RELATIONS 53 



Sespe. However, he recognized the fauna as Eocene. These 

 are all typical Tejon species and evidently came from Tejon 

 strata underlying the Sespe, for it is known that Tejon is ex- 

 posed in the immediate vicinity. Southwest of Sespe Gorge 

 near the Silver Thread oil field the Tejon is exposed as a 

 southerly overturned anticline with NE.-SW. axis. In no 

 published reports has the name Topa-Topa been applied to 

 strata older than Tejon, and it is improbable that the Martinez 

 will be found exposed farther to the northwest in the region 

 of less intense folding. 



Relations of the Cretaceous and Eocene Formations 

 South of the Santa Monica Mountains 



South of the Santa Monica Mountains, the structure is even 

 more complicated. Two large faults cut across Topanga Can- 

 yon (see fig. 3, p. 51 ), and a large wedge-shaped block of Chico 

 sediments is exposed. These consist of about 6000 feet of sedi- 

 ments, the lower 1500 feet being largely sandstone with dark 

 micaceous shales interbedded. Above are about 4000 feet of 

 well consolidated conglomerates with interbedded sandstones 

 and shales, the pebbles of which vary from one inch to four or 

 five inches in diameter. The upper division consists of 1200 

 feet of shale and light colored, fine-grained, medium bedded 

 sandstone. The sandstones are characterized by an abundance 

 of biotite. The lower sandstones are fossiliferous in places. 

 The only fossil found in the upper shales was Scutella ( ?) 

 species. Scattered over the surface of this Cretaceous area are 

 remnants of the Martinez strata, in places bearing fossils. 

 Some of the boulders bearing these Martinez fossils have 

 found their way into the stream channels. The Martinez fos- 

 sils found in this area at Locality 5 are the following : 



Fasciolaria mucronata (Gabb), Retipirula crassifesta 

 (Gabb). Pseud oliva howardi (Dickerson), Polynices hornii 

 (Gabb). Turri fella martinezensis Gabb. Turrit clla pachecoensis 

 Stanton. 



\ strip a mile and a half wide to the southwest, bordering 

 the coast, is brought into contact with the Chico by faulting. 

 This formation is terminated by faulting east of Malibu 

 Canvon. Faulting has complicated the structure to such an 



