South Dakota School of Mines 



Bulletin No. 13. Plate No. 7. 



Reproduction of Hayden's second Geological Map of the Upper Missouri 

 country. This map is the first ever published showing any details of 

 the geology of the Black Hills. The geology of the surrounding 

 country, including the Badlands, is more fully indicated than in 

 Hayden's earlier map. Hayden, 1858. 



