10 Universitij of California Publications in Geology [Vol. 12 



amounts of limestone and conglomerate. A hard calcareous basal 

 sandstone rests immediately upon the Franciscan series. It is locally 

 an imi)ure limestone, and in places conglomeratic, the pebbles being 

 derived mainly from the Franciscan rocks and ranging in size up to 

 four inches in diameter. Upon this basal portion are about 1400 feet 

 of bluish-gray shales, which weather readily into a fine clay soil form- 

 ing low rounded hills and saddles on the ridges. Interbedded with 

 this shale are layers of micaceous, rather coarse-grained sandstone, 

 usually about an inch thick. These weather out of the shale and 

 remain as thin flags on the surface. The following fossils, which show 

 that it is of unmistakable Tejon and i\Ieganos age, have been obtained 

 within this shaley member : 



Fossils from the Eocene 



Sohizaster, cf. dialiloensis Kew 



Leda, sp 



Ostrea, cf. idreaensis Gabb 



Macrocallista conradiana (Gabb) 



Meretrix hornii Gabb 



Modiolus ornatus (Gabb) 



Tellina remondii Gabb 



Venericardia planieosta liornii (Gabb). 



Amauropsis alveata (Conrad) 



Nyetiloclius whitiieyi (Gabb) 



Psamniobia, cf. hornii (Gabb) 



Surcula io (Gabb) 



Turris suturalis(?) (Cooper) 



Turritella andersoni Dickerson 



Turritella, sp 



Turritella uvasana Conrad 



3503. 



3.504. 



2308. 



3505. 



3506. 



3507. 

 3508. 



3509. 

 3510. 



East side of Loina Alta mountain at head of two large caiions extend- 

 ing west from Redroek Canon. 



In Oso Creek, just south of the narrows; in muddy sandstone between 

 massive brown shales and bluff white sandstone. 



In west branch of Redroek caiion and about three-quarters of a mile 

 northwest of their juncture. 



Santa Ynez Mountains in gray shale near steep pitch close to top of 

 the Arroyo Burro trail. 



Santa Ynez Mountains on the Ridge trail in saddle west of Arroyo 

 Burro trail. 



East side of Oso Creek in second caiion north of mouth. 

 On west side of Paradise Canon near its mouth; in dark greenish- 

 gray shales. 



In Lewis Caiion immediately above falls; in hard bluish sandstone. 

 In Oso Canon about two miles north of mouth; in soft sandstone about 

 200 feet stratigrai)hically above bluff light-tan sandstone. 



North of the river, these shales grade up into fine-grained, thin- 

 bedded sandstone, upon which rests the massive buff to light-gray 



