230 F\ REPORT OF PROGRE88. B. W. CLAYPOLE. 



All the water of tlie township readies Sherman's creek. 

 BrowrC s run entering from Toboyne comes in at Mount 

 Pleasant. Houston's run, draining the valley between 

 Chestnut hills and Bower mountain, passes through a gap 

 in the former called Beavertown narrows and reaches Sher- 

 man's creek at Enslow's mill. Laurel run or Murray run 

 drains the narrow valley at the south of the township and 

 passes into Madison. 



The chief ridges guiding the course of the streams are 

 ( \> i K'cocl league mountain, a monoclinal southeast dipping 

 range — the other half of which is West Tuscarora ; Bower 

 mountain, here an anticlinal but farther west cleft like the 

 former over the axis into two monoclinal ranges. Both 

 these consist of the Medina sandstone, No. IV, and rise to 

 nearly equal height. Chestnut hills, which part the waters 

 of Houston's run from those of Sherman's creek as far as 

 Beavertown, are an interrupted ridge or chain of hills cross- 

 ing the township near its middle and formed of the upbent 

 Iron sandstone and ore sand-rock carrying the Clinton 

 (Bloomsburg) red shale No. V on their slopes. 



The Utica and Hudson River shales, No. III. 



The description given of these rocks in the report on To- 

 boyne township exactly represents them as they occur in 

 Jackson. Further notice would be only useless repetition. 



The Medina sandstone, No. IV. 



Six outcrops of this sandstone occur in the township. 



1. West Tuscarora mountain forms its northern bound- 

 ary. This is the northwest dipping half of the Horse Val- 

 ley arch, and exposes the whole thickness of the formation — 

 both the Upper white and the Lower red sandstone. The 

 latter may be seen on the inner slopes of the Horse valley 

 and the former on the to}) and outer slope of the ridge. 



w J. A small fold forms a projecting spur at the northeast 

 end of Horse valley, locally known as the Locking of the 

 Mountains, This divides the end of the valley into two 

 parts, neither of which extends far. 



3. Conecocheagae mountain. This range consists of the 



