70 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



the full interval being 93 feet. Eastward from Lewis mills, on the 

 railroad, one descends rapidly in the section, and at Warnock a coal 

 bed underlying 26 feet of sandstone is at 96 feet above the Upper 

 Sewickley. 



At Lewis mills the lowest coal bed underlies 23 feet of "sandrock 

 with more or less of sandy shale." Three miles east from Warnock, 

 Professor Andrews reports a coal bed at 174 feet above the Upper 

 Sewickley, which would be very near the place of the highest coal bed 

 at Lewis mills, if there be no change in the section. No measurement 

 is available along the railroad, but there is one reported by Professor 

 Andrews in Washington township, 8 miles south from Glencoe and about 

 3 miles east from one already given from the same township ; this shows : 



Feet Inches 



1. Tunnel seam Not measured 



2. Interval 47 G 



3. Coal and shale 3 



4. Interval 122 



5. Cumberland [Upper Sewickley] coal bed. .35 



giving 172 feet as the interval from the Tuimel seam to the Upper 

 Sewickley; so that the high bed at Glencoe is the Tunnel seam. 



Passing Glencoe, one has the lower portion of the formation exposed 

 repeatedly to Bellair, where the measurements by Professor Brown 

 make the interval from Waynesburg to Upper Sewickley 165 feet. The 

 correlations for the higher beds at Bellair, Lewis mills, and Barnesville, 

 with the intervals, are: 



Feet Feet Feet 



Waynesburg A 



Interval 53 53 43 



Waynesburg (Tunnel) 



Interval 40 39 31 



Uniontown 



The interval below the Wa3raesburg is to the bottom of the Uniontown 

 coal bed. The Waynesburg A belongs to the Dunkard formation. At 

 Bellair the Uniontown is 127 feet above the Upper Sewickley — at Glen- 

 coe, 96, and at Barnesville 71 feet. Between Glencoe and the river the 

 interval between the Upper Sewickley and the Pittsburg varies in Pro- 

 fessor Andrew's sections from 72 to 79 feet, while at Barnesville it is 

 96 feet, the increase being due to the appearance of a thick sandstone 

 almost directly under the upper coal bed. The Lower Sewickley and 

 the Redstone are still recognizable at Barnesville, but they are very 

 thin. The interval from the Pittsburg to the Waynesburg (Tunnel) 



