BULL, DEPT. GEOL. UNIV. CAL 



VOL. 6, PL. 36 



A. Exposure of fine ashy and shaly tuff member of Rosamond Series in the south 

 limb of syncline, showing characteristic weathering of the unconsolidated beds. At the 

 right with a fault contact are strata of the basal breccia member. On the left in nor- 

 mal succession are the basal beds of the resistant breccia member. The capping is of 

 later alluvium. 



B. Fossiliferous tuff member of the Rosamond Series exposed in the trough of the 

 Barstow syncline, near the west end of the exposure 1 . The badlands are characteristic 

 of the less consolidated portion of the series. Through the middle in the middle dis- 

 tance runs the indurated basal layer of (he later alluvium, which here dips 2° to the 

 southwest. 



