TENTH ANNUAL EEPOET 



OF THE 



UNITED STATES 



Geological and Geographical Survey 



TEI?.K/ITOK>IES, 



EMBRACING 



COLORADO AND PARTS OF ADJACENT TERRITORIES, 



REPORT OF PROGRESS OF THE EXPLORATION FOR THE YEAR 1876. 



F. V. HAYDEN, 



XJNITEID STATES G-EOLOGIST. 



. 8117 



cOjTOu-cted ukdee the authopjtt oe the seceetaey of 



THE INTERIOK. 



WASHINGTON: 

 GOVEKNMENT FEINTING OTFICE. 



1878. 



