DEPARTMENT OF THE INTERIOR 



U. S. GEOGRAPHICAL AND GEOLOGICAL SURVEY OF THE ROCKY MOUNTAIN REGION 



J. W. POWELL IN Charge 



REPORT 



GEOLOGY AND RESOURCES 



OF THE 



BLACK HILLS OF DAKOTA 



WITH ATLAS 



By henry NEWTON, E. M., and WALTER P. JENNEY, E. M. 





WASHINGTON 



GOVERNMENT PRINTING OFFICE 

 1880 



