PHYSICAL GEOGRAPHY OF THE COUNTY. P. 29 



when their rocks all dip one way ; anticlinal, when their 

 rocks plunge from the center line of the valley in opposite 

 directions toward and under the bounding ridges ; syncli- 

 nal, when their rocks slope in from the sidehills towards 

 the centre line of the valley. 



The monoclinal valleys of Perry county are such as Rac- 

 coon valley, Little Buffalo creek valley, AVildcat creek and 

 Barger's run valley, Little Juniata creek valley above and 

 below Montebello narrows, Sherman's valley from 5 miles 

 west of Delville down, the Grier's Point-Keystone-Fen wick 

 valley south of Little mountain, and Polecat valley. 



There are four anticlinal valleys in Perry county — Horse 

 valley at its west end, Pfontz's valley in the northeast, 

 Bloomfield valley in the middle, and the Little Bridgeport 

 valley in the southwest. 



The synclinal valleys of Perry county are those through 

 which Upper Sherman's creek, Brown's run, Houston's run, 

 Laurel run, McCabe's run, and Green run descend between 

 anticlinal mountain spurs ; and those through which the 

 lower part of Buffalo creek, the lower part of Sherman's 

 creek. Cove run. and Hunter s run flow to their mouths. 

 All these streams flow eastward along troughs tilted up at 

 their western ends, as water which falls upon the forcastle 

 of a ship necessarily flows aft into the waist. 



