MONONGAHELA FORMATION 79 



this sandstone is very coarse, sometimes thickening so as to fill the 

 whole interval to the place of the Wa3Tiesburg, while the underljring 

 Uniontown coal bed is 3 feet thick and double, as in Lawrence town- 

 ship 3 or 4 miles west north of west. At 3 or 4 miles farther the Cowrun 

 anticline or "oil break" is reached. The Pittsburg and Upper Sewick- 

 ley seem to be wanting. 



On the westerly side of the fold exposures are poor and information is 

 wanting. An oil boring at Marietta shows the Pittsburg and Upper 

 Sewickley absent, and the same is true at Parkersburg, West Virginia, 

 about 10 miles below Marietta. The record at Marietta begins about 220 

 feet above the place of the Pittsburg, and that at Parkersburg at about 

 400 feet above the same horizon, but no evidence that the Uniontown is 

 present appears in either record. No trace of the sandstone overlying 

 the Uniontown coal bed is present in the Parkersburg well, opposite 

 Belpre, Ohio, but the higher sand, about 240 feet above the Pittsburg, is 

 present, 15 feet thick. Pour or 5 miles farther down it comes up from 

 the river bed as a coarse rock, and thence for many miles is an important 

 member of the section. 



The sections published are for the most part imperfect, as exposures 

 are bad, so that one may not speak with certainty respecting distribution 

 of red shale. On the western border a bed 24 feet thick is shown in 

 one section at 30 feet above the Upper Sewickley; in Adams township 

 the same horizon shows 52 feet at 27 feet, and in Ludlow 27 feet at 18 

 feet above the same coal bed. In the southern part a record at Marietta 

 shows a great mass beginning in the Conemaugh and continuing upward 

 into the Monongahela for at least 50 feet, and other beds are at 85 and 

 120 feet higher, the lower one apparently at the horizon above the Upper 

 Sewickley.* 



Meigs county is south from Athens and borders the Ohio river. The 

 Monongahela is only on the eastern half of the county. From the 

 northeast corner of Washington county the Ohio river flows almost west 

 of southwest, so that when Meigs county is reached one has come near 

 to the western outcrop of the Monongahela; but from the Athens line 

 the river flows almost southward for more than 20 miles and for the 

 greater part of the distance one seldom sees anything below the lowest 

 beds of the Dunkard. At. Antiquity, on the river, 16 miles South from 

 the Athens line, is a measurement by Doctor White : 



* E. B. Andrews : Vol. ii, pp. 460, 461, 462, 463, 471, 472, 475, 476, 478, 479, 482, 

 483, 496, 499, 503, 504, 505, 506, 507. 

 E. Orton : Vol. vii, pp. 399, 400. 

 J. A. Bownocker : BuU. 1, pp. 136, 142. 

 I. C. White : Catalogue of West Virginia University, 1888-1884, pp. 73, 74, 75, 76. 



