1921] Fricli: Faunas of Bautista Creek and San Timotco Canon 339 



hills. The red phase extends over the entire southern portion of the 

 Potrero basin, whose water courses have cut deep channels in the 

 heavily cemented mass. Northward, where the overlying Eden is 

 again encountered, the upper beds are gray and finer. East of 

 Potrero Creek the coarse deposit rests in magnificent, north-dipping 

 exposures of alternating gray and reddish beds against the sides of 

 Mount Claremont, rising to an altitude of 3500 feet. 



One hypothesis suggests the correlation to these deposits with sand- 

 stones of the San Bernardino cailons to the north, which have been 

 believed to be of Miocene age. No determinable material was secured 

 in the short time devoted to this area. 



Eden Fossil Localities where More Important Specimens were Collected 

 Altitudes barometrically checked (see fig. Ic) 





Univ. Calif, 

 loc. 





Mastodon station 



3265 



NE portion SW H of Sec. 23, T. 3 S, R. 2 W. 



Low diggings 



3266 



SE portion SE H of Sec. 23, T. 3 S, R. 2 W; 







no. 11, fig. Ic 



Eden flats 



3267 



E portion NE of Sec. 23, T. 3 S, R. 2 W; 







no. 10, fig. Ic. 



Eden flats, "B" 



3268 



W central portion of Sec. 23, T. 3 S, R. 2 W. 



Eden ledges 



3269 



Central portion SW M of Sec. 24, T. 3 S, R. 2 







W; no. 12, fig. Ic. 



Camel station no. 1 



3270 



SE portion SE ]i of Sec. 24, T. 3 S, R. 2 W. 



Lamb vertebrae 



3271 



SE portion NW of Sec. 32, T. 3 S, R. 1 W; 







no. 13, fig. Ic. 



Potrero clay 



3272 



SW }i of NE M of Sec. 4, T. 4 S, R. 1 W. 



Camel station no. 3 



3273 



SW M of NW 14 of Sec. 30, T. 4 S, R. 1 W. 



Potrero 



3274 



NE K of NE 14 of Sec. 33, T. 3 S, R. 1 W. 



Potrero 



3275 



W central portion of NW H of Sec. 34, T. 3 



S, R. 1 W, no. 14, fig. Ic. 



Description op Eden Pliocene Fauna 



The distance of the Eden type locality from hitherto described 

 deposits of the Western Hemisphere yielding Pliocene mammalia, 

 immediately suggests the possibility of the Eden life representing a 

 new geographic phase. The following studies, the consideration of 

 the Eden material as a whole, and the comparisons of the more fully 

 represented forms with those of the other known assemblages of the 

 Pliocene point to this assemblage as representing a new phase of late 

 Lower Pliocene life. 



