APPENDIX. 

 Generalized Section for the Black Hills — Continued. 



567 



Names of Formations. 



Thickness 

 in Feet. 



Characteristics. 



cg 03 | 



Minnelusa 

 tion. 



forma- 



400-450 



Sandstones, mainly buff and red; in greater 

 part calcareous; some thin limestone in- 

 cluded. 



Pahasapa lime- 

 stone. 



250-500 



Massive gray limestone. 



.2 °< 



Englewood lime- 

 stone. 



25 



Pink, slabby limestone. 



3 w \ Ordovician. 



80 



° 



Massive limestone, usually buff with brown or 

 reddish spots. Present only in northern 

 Black Hills region. 



g J Deadwood 

 tion. 



forma- 



0_g I 



£J3 



* a 



03 

 O 



Unconformity 



4-150 



Red-brown quartzite and sandstone, locally 

 conglomeratic. 



Crystalline schists. 



