BULL. DEPT. GEOL. UNIV. CAL. 



VOL. 6, PL. 43 



A. Northwardly-dipping strata of the resistant breccia member of the Rosamond Series 

 in the south limb of the Barstow syncline have been beveled by peneplanation and capped 

 with a mantle of later alluvium. The surface of the alluvium slopes toward the local basin 

 at an angle of 2°. Recent stream dissection in middle distance. 



B. Recent dissection of piedmont alluvial slopes. The flat-topped divide in the cen- 

 ter, composed of the later alluvium, slopes towards the local basin with a surface angle 

 of l 1 /^ , yet the canons have been excavated since the deposition of the alluvium. 



