"'T--,,,-i-,, :.= .-. f It, f, 



SIXTH ANNUAL REPO 



515 





iitn 



DA'ITED STATES 



SURVEY 



THE TERRITORTirS; 



EMBKACIKG 



PORTIONS OF MONTANA, IDAHO, WYOMING, AND UTAH/^ 

 BEING A REPORT OF PROGRESS OF THE EX- 

 PLORATIONS FOR THE YEAR 1S72. 



/ 



F. V. HAYDEN, 



United States pEOLOGisT. 



ig^ S. Kcitiono 



COKDUCTED UNDEE THE AUTHORITY OF THE 

 SECRETARY OF THE INTERIOR. 



WASHINGTON: 



GOVERNMENT PRINTING O F F' 1 E7 



1873. 



