72 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



somewhat more than 5 feet thick. It underlies 27 feet of massive sand- 

 stone. The Upper Sewickley coal bed in the same area is triple, about 



5 feet thick and 113 feet below the Waynesburg, which is coal and 

 black shale 23 inches thick and underlies a coarse white sandstone. 

 Professor Brown found the interval to the Uniontown 128 feet in one 

 place, where the Upper Sewickley is less than 90 feet above the insig- 

 nificant Pittsburg. 



In Morgan county, south from Muskingum, the Pittsburg shows a 

 ragged boundary. Along the western border it is wanting at the north, 

 then reappears 2 feet thick and increases southwestwardly until, in the 

 southwest township, it becomes 9 feet; but it disappears abruptly, so 

 that in a well no trace of it was found and two beds of red shale 12 

 and 24 feet thick were found at 150 and 281 feet above the Ames lime- 

 stone. The lower bed is at the place of the Pittsburg and underlies 

 the Pittsburg sandstone, while the higher bed is at the place of that 

 seen on the Guernsey-jSToble border at 30 feet above the Upper Sewick- 

 ley. Eastwardly the Pittsburg is equally variable and it disappears 

 before the eastern boundary has been reached. A thin coal bed, almost 

 midway between the Upper Sewickley and the Pittsburg, is reported 

 at several places. The Upper Sewickley coal bed, 238 to 250 feet above 

 the Ames limestone, is as variable as the Pittsburg, being important 

 along the Muskingum border, but thinning and finally disappearing 

 toward the southwest. In the central townships it rarely exceeds 2 feet 



6 inches, while on the eastern side, where the Pittsburg is absent, it 

 thickens to 4 feet. The interval to the first coal above the Upper 

 Sewickley is given as 120 feet near the Muskingum border, but at the 

 south, near the Athens line, it is from 96 to 115 feet. For the most 

 part this bed is thin and -it nowhere exceeds 2 feet. In Center town- 

 ship a coal at 156 feet above the Upper Sewickley may represent the 

 Waynesburg; it is 100 feet below the Washington. The same bed 

 is in Marion at 150 feet above the Upper Sewickley and 54 feet above 

 the blossom of the Uniontown. Limestone beds are not thick, but they 

 are numerous in the interval below the Uniontown, recalling the con- 

 dition observed in eastern Belmont.* 



Noble county, south from Guernsey, is east from Muskingum and 

 Morgan. The Pittsburg coal bed, 92 feet below the Upper Sewickley 

 (Meigs Creek), is present in the northeast township at a few miles 

 southwest from Barnesville, in Belmont county. A mere trace' of the 



* Muskingum. E. B. Andrews : Vol. i, pp. 339, 340. C. N. Brown : Vol. v, pp. 1070, 

 1071. 



Morgan. Andrews : Vol. i, pp. 294, 295, 296, 301, 302, 304, 305, 307, 309, 310, 

 312, 317. Brown : Vol. v, 1067, 1069. J. A. Bownocker : Bulletin 1, p. 136. 



