BULL. DEPT. GEOL. UNIV. CAL 



VOL, 6, PL. 35 



A. Contact of basal breccia member of Rosamond Series with basic andesite or acid 

 basalt, north limb of Barstow syncline. The lighter portion of the lava next the con- 

 tact is more weathered than the darker portion to the right. 



B. Tuff breccia member of Rosamond Scries resting on granitic rock with erosion 

 unconformity at base of north limb of Barstow syncline. The graded profile of the 

 granitic rock surface al the left and the strike valley in tl enter should be noted. 



