102 



GEOLOGY OF THE EUREKA DISTRICT. 



pect Peak and Hamburg Ridge, the erosion of the Secret Canyon shale is 

 not so well shown as it would be if the section had been drawn either to the 

 north or south of this point, but it is quite sufficient to bring out the promi- 

 nence of the Hamburg Ridge, which is everywhere parallel to the main 

 ridge. Overlying the Hamburg shale occurs the Pogonip limestone, in turn 

 followed by the Eureka quartzite, which occupy the long slope down to 

 the Hoosac fault. The entire series of beds dips to the east, with angles 

 varying from 75 to 85. The section across these beds from the axis of 

 the fold is as follows : 



Prospect Ridge Section. 



Along the line of this section there has been less faulting, crushing 

 and local displacement than anywhere else on the ridge. Such local 

 disturbance as has taken place in the uplifted mass is more apparent in the 

 Prospect Mountain limestone than in the other horizons, partly owing to 



