19. watts township. F 2 . 381 



So far as time has allowed me to determine it, this sub- 

 sidiary fault extends about three miles to the east-north- 

 east where it finally dies out. 



But the fault above mentioned does not include all the 

 complications of the Hamilton sandstone in Watts town- 

 ship. Immediately south of the outcrop thrown up by It 

 occurs another, bringing up the topmost beds of the same 

 sandstone. It is difficult to determine from the exposure 

 whether a complete arch exists at this place or not. But 

 the evidence I have been able to obtain leads me to the con- 

 clusion that we have here the eastern termination of the 

 Perry county fault. ' The axis of the arch above mentioned 

 is exactly in the line of Dick's hill, and the indications of 

 rapid decline in the throw of the fault at the east end of 

 that range prepare us to expect its disappearance at no great 

 distance. According v we here find the missing northern 

 slope of the Dick's hill anticline reappearing from its long 

 submergence. It once probably passed near Bridgeport 

 and thence possibly along the present site of Kennedy's 

 valley into Cumberland county where the anticline may still 

 be traced. But erosion long ago destroyed it and no vestige 

 of it now remains. This is an indication, if any such were 

 necessary, of the great antiquity of the fault. 



The Hamilton sandstone sinks rapidly at the east end of 

 Dick's hill, so that the range suddenly disappears. From 

 this point the exact line of the fault cannot well be traced 

 across the low flat ground by the river side, but the reap- 

 pearance of the sandstone in Watts township restores it. 

 This outcrop runs about 33° north of east and may be traced 

 about three miles into the township where it ends by unit- 

 ing with the other ranges above described. 



The northern line of this township is therefore a focus 

 where meet all the four ridges named above which are prom- 

 inent features in the geography of Perry county. From 

 near the middle of this line they radiate — Buffalo hills to 

 Centre, Limestone ridge to Xew Germantown, Mahanoy to 

 Elliotsburg and Dick's hill, under various aliases, to Oak 

 Grove. Geologically three of them may be traced back 

 again — Buffalo hills, by Racoon and Wild Cat ridges, to the 



