DEPARTMENT OF THE INTERIOR. 



!.(>!.m;U'AL AND liKOGRAPHICAL SURVEY OF THE TKRIUTORlIih! 

 < i 



W. POWELL, OKI .1.1 MUST IN CJ 



i^ 



GEOLOGY 



' OF TI1K 



EASTERN PORTION OF THE UMA MOUNTAINS 



A REGION OF COUNTRY ADJACENT THERETO. 



WITH 



BY J. W. POWELL. ( 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 187C. 



