

- -■ • '■■- ... ' r- 



South Dakota School of Mines 



Bulletin No. 9. 

 DEPARTMENT OF GEOLOGY. 



THE BADLAND FORMATIONS 



OF THE 

 BLACK HILLS REGION 



BY 

 CLEOPHAS C. O'HARRA 



t'sii 



Rapid City, South Dakota, 

 November, 1910. 



