BULL. GEOL. SOC. AM. 



VOL. 18, 1906, PL. 28 



kte^vLi,.:. 



FlGriRE 1. CBRRO COCHIXO (BriTTE XU.MREK G) FRO.M THE WEST 



Showing undisturbed sediments well up toward top of butte 



Figure 2. — Butte nu.mi'.kr 7, ix Tin; Sihe hf 1'riet.v .Mes.v 

 Showing undisturbed enclosing sediments 



BUTTES NUMBERS 6 AND 7 



