292 P. REPORT OF PROGRESS. E. W. CLAY POLK. 



creek. It continues into Carroll township, in the report on 

 which ;uid in the general account of the county will be 

 found, more details on this interesting stratum. 



The Pocono sandstone, No. X. 



The outcrop of this hard and massive sandstone forms 

 a rampart around the cove, about 1000 feet high, with a 

 level and unbroken crest ; sweeping from near Duncannon 

 first southwest for four miles ; then turning and running in 

 a straight line back eight miles to the Susquehanna. 



This Horse Shoe Bend, as it is called, affords one of the 

 most beautiful views in the county, the mountains clad 

 witli wood from base to summit forming a green back- 

 ground to the river scenery. 



Pocono sandstone coal bed at Duncannon. 



About six years ago a tunnel was driven about 200 feet 

 into the cove mountain by Mr. John Foose of Duncannon 

 directly across the strata, here dipping steeply southward. 



At about 150 feet from the entrance a bed of shale was 

 cut about ten feet thick, containing two seams of coal — 

 the upper about ten inches, the lower about thirty inches 

 thick — separated by two feet of black shale. Two feet of 

 black shale covered the upper coal. 



The coal occurs in small pieces and is much crashed and 

 slickensided. It would, I think, come out in pueces seldom 

 exceeding a pound or two in weight. A specimen from this 

 seam or from another to be noticed below was analysed at 

 Harrisburg some years ago by Mr. A. S. McCreath, with 

 the following results : 



Volatile matter, 14.38 



Fixed oarbon, 48.28 



Sulphur, 32 



Ash, 30.44 



li i- easy to see from the high proportion of ash that the 

 conl is of very low grade. I add for comparison an analysis 

 of the Lykens Valley coal made by the same chemist: 





