DEF^IiTJVIEN-T Oin THE INTERIOR. 



UNITED STATES GEOLOGICAL AND GEOGRAPHICAL SUliVEY OF THE TERRITORIES. 

 F. V. HAYDEN, U. S. Geologist-in-Charge. 



TOPOGRAPHICAL AND GEOLOGICAL REPORT 



ON 



THE SAN JUAN COUNTRY. 



BULLETIN, NO. 3.-SEC0ND SERIES. 



1 s J 



