PRELIMINARY REPORT 





NITED STATES GEOLOGICAL SURVEY 



WYO 



PORTIONS OF CONTIGUOUS TERRITORIES, 



(BEING A SECOND ANNUAL REPORT OF PROGRESS,) 



CONDUCTED 



UNDER THE AUTHORITY OE THE SECRETARY OF THE INTERIOR, 



F. V. HAYDEN, 



UNITED STATES GEOLOGIST. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1872. 



