206 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



At Grafton, in Taylor county, 20 'miles south from Morgantown and 

 in continuation of the Pennsylvania Second bituminous basin, the Ames 

 limestone, Harlem coal bed, and the Pittsburg reds are well shown, the 

 last being 30 feet thick. A massive pebbly sandstone is at 25 feet above 

 the Ames, and another, at 190 feet below that limestone, rests on dark 

 plant-bearing shales with a thin coal at the bottom, the coal being at 

 250 feet. Two miles south, at Webster, the Ames is at 308 feet below 

 the Pittsburg, and a thin coal bed is at 195 feet below the limestone, 

 underlying calcareous and black shale. This is 120 feet above the bed 

 identified on a previous page as the Lower Freeport, and the Mahoning 

 interval is filled mostly by shale. The thin coal at Grafton appears to 

 be at the Upper Freeport horizon and that at Webster is the Brush Creek.* 



Harrison county, west from Taylor, is south from Marion. Near 

 Clarksburg, 15 miles west from Grafton, the interval from Pittsburg to 

 Upper Freeport is 540 feet, 35 feet less than at the nearest well recorded 

 in Marion county. The first sandstone is at 365, 35 feet thick, and the 

 Mahoning interval is marked by a continuous sandstone from 421 to 505 

 feet below the Pittsburg and resting on 35 feet of shale. This sandstone, 

 in its upper part, reaches beyond the place of the Brush Creek coal bed 

 and encroaches on the Buffalo interval, the higher sandstone reaching 

 into the Cowrun. Two records are available in northern Harrison near 

 the Marion line, where the Cowrun sandstone is persistent, its top being 

 at 352 and 362 ; but in the latter case it is continuous with the Buffalo 

 and downward into the Upper Mahoning at 457 feet. In both records 

 the Upper Mahoning is almost wholly shale, and the Lower Mahoning 

 sandstone, beginning at 492 and 512, extends downward into the Alle- 

 gheny, its bottom being at 592 and 602 feet below the Pittsburg. The 

 red beds are in characteristic contrast, for, though the wells are but 2 

 miles apart, the great bed of 100 feet seen in one at 102 feet below the 

 Pittsburg is wholly wanting in the other, where one finds only a 40-foot 

 bed beginning at 232 feet, which is represented in the former by 15 feet, 

 beginning at 262 feet. This last is at the horizon of the "Big Red" of 

 oil records in Washington county, Ohio. At West Milford, 10 miles 

 south from Clarksburg, the first trace of coal is' at 600 feet below the 

 Pittsburg, probably at the Lower Freeport horizon in the Allegheny. 

 Some red rock is at 95 feet and a 50-foot bed begins at 375 feet. At 

 Cherry Camp, 10 miles west from Clarksburg, the only sandstone is 30 

 feet thick, beginning at 343 feet below the Pittsburg ; all else is shale to a 

 sandstone in the Allegheny at 642 feet. The higher sandstone is, at least 



t I. C. White : Vol. ii, pp. 232, 298. 



