236 The Upper Coal Measures 



The Redstone (VIII a), like the preceding, is seen in Ohio, 

 only near Wheeling. At Belleair it is six inches thick im- 

 beddecl in one foot of black shale and enclosed by the lime- 

 stone. At the limestone qnarry near Benwood, W. Va., it 

 is barely one foot thick, a confused mass of shale and coal. 

 At Wheeling it has the same character. On Scott's and 

 Robinson's Runs, in Monongalia Co., it is from three to four 

 feet thick, and yields a coking coal of very superior quality. 

 In Pennsylvania it is a variable coal, ranging from eighteen 

 inches to four feet in thickness. 



The Pittsburg (VIII) is well exposed in Belmont, Guern- 

 sey, Harrison and Jefferson counties, Ohio, as well as in Ohio, 

 Brooke, Marion, and Monongalia counties. West Virginia. 

 Its most westerly exposure, aside from isolated patches, is 

 at Sales ville, on the Central Ohio railroad, thirty-seven miles 

 west from Wheeling, and its most northerly exposure, at 

 Knoxville, Jeiferson Co., about the same distance north from 

 Wheeling. Wherever accompanied by its normal roof, shale, 

 succeeded by limestone, it is a double bed, consisting of two 

 or even more divisions of coal separated by shale or clay. 



In Guernsey and Western Belmont, where the overlying 

 limestone shale has been removed to be replaced by sand- 

 stone, this bed has suffered the loss of its upper layers, and 

 for the most part is single-bedded, varying from four to five 

 feet in thickness with the sandstone resting directly upon it, 

 or at most, separated by only a few inches of shale. In 

 some localities the eroding current excavated deep trenches 

 in the coal itself. These, having been filled up with sand, 

 now appear as huge sandstone "horsebacks" from five to 

 sixty feet wide. The change in the accompanying rocks is 

 shown in the followino; sections. 



No. I is from Baruesville, Belmont Co. 



No. II is from Sewellsville in the same county and north from Barnes- 

 ville. 



No. Ill is from Moorfield, Harrison Co., and north from Barnesville. 



No. IV is from near Deersville, " " " " " " 



No. V is from Egj'pt, Belmont Co., a short distance east from Sewells- 

 ville. 



