78 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



red bed. The Upper Sewickley is from 5 to 6 feet thick, double, with 

 a clay parting varying at expense of the coal, from 2 inches to 2 feet 

 thick. This bed yields a good fuel, though somewhat high in ash. The 

 Pittsburg coal bed is thin, from 1 foot 2 inches to 2 feet 10 inches, oc- 

 casionally cannel. It underlies alternating limestone and shale, about 

 10 feet, and a similar "group" is at 20 feet higher. The Pittsburg is 

 known as the "limestone" and the Upper Sewickley as the "sandstone" 

 vein. 



The section is equally clear in the tier of townships next south. The 

 Uniontown is 95 feet above the Upper Sewickley in Muskingum, but 

 only 82 feet in Lawrence, 8 miles east. It overlies its clay and limestone 

 and varies in thickness from 2 .feet 4 inches to 4 feet 3 inches. At the 

 west it is double, but in Lawrence it is broken into six layers of coal 

 and shale and a variable sandstone is above it. The bed seems to be 

 irregular farther east in Independence township, where it is shown in 

 one section, but is wanting in another, where, however, its overlying sand- 

 stone is shown at somewhat less than 100 feet above the Upper Sewick- 

 ley. This sandstone is especially well marked along the river townships 

 and is rather uncertain at the west, where the higher sandstone is present. 

 For the most part the sandstone overlying the Upper Sewickley is coarse 

 and massive, sometimes pebbly and occasionally 60 feet thick. In Law- 

 rence township, 7 or 8 miles northeast from the city of Marietta, Pro- 

 fessor Andrews found, at 42 feet above the Upper Sewickley, a coal bed 

 varying from a mere trace to 4 feet 6 inches. It seems to be confined 

 to a very small area, for no trace of it appears anywhere else in the. 

 sections, though Andrews says that he has observed some traces of it 

 in other townships. The Upper Sewickley becomes thin and uncertain 

 in the eastern townships, occasionally 3 feet thick, but usually much 

 less and often wanting. The Pittsburg, 85 to 91 feet lower, is wholly 

 unimportant, usually little more than a trace, but the limestone above 

 it persists. These conditions closely resemble those observed in Tyler 

 and Pleasants of West Virginia. 



East from the Cowrun anticline the beds fall rapidly to the east and 

 details are lacking in the river townships, Grandview, Independence, and 

 Newport. Doctor White's long section in southern Grandview, about 7 

 miles below the Monroe line, shows what appears to be the Washington 

 of the Dunkard at 150 above the river, so that the place of the Union- 

 town is not reached ; but at 4 miles lower down the Uniontown is reached, 

 3 feet thick, 10 feet under a massive sandstone and 161 feet under the 

 Washington coal bed. Two miles farther down, in Nevrport township. 



