4. GREENWOOD TOWNSHIP. F a . 221 



The Pocono sandstone, JYo. X. 



This is the highest stratum occurring in Greenwood town- 

 ship and with it the geological history ends. It constitutes 

 the axis of Buffalo mountain and its beds dipping steeply 

 to the S. S. E. meet at the eastern end of the township the 

 N. N. W. dipping beds of Berry's mountain, and both rise 

 together into the higli knob known as Buffalo mouutain at 

 Newport. Owing to the great hardness of this stone it has 

 resisted the weather which has destroyed and carried away 

 so vast a mass of the softer rocks and, as may be seen by 

 inspecting the section of the township given herewith, has 

 also removed no inconsiderable quantity of the resistent 

 sandstone. 



This sandstone is of the same nature and age as that com- 

 posing the Cove mountain in the southeast of the county, 

 and for further details concerning it the reader is referred 

 to the account of Buffalo and Penn townships. 



The thickness of this sandstone, as nearly as can be de- 

 termined, is about 2000 feet. 



