MONONGAHELA FORMATION" 73 



bed was seen at one place in the adjoining township, but elsewhere 

 it seems to be wanting. Its horizon is exposed in most of the townships, 

 and oil borings have been made in others where its place is below the 

 surface. Its place is 92 to 102 feet below the Upper Sewickley and 140 

 to 160 feet above the Ames limestone. The Lower Sewickley is present 

 in the northeast corner at 20 to 25 feet below the Upper, and in some 

 other parts of the county traces of a lower bed were seen at 50 to 60 

 feet. Limestone in thin bands often occurs within 70 feet below the 

 Lower Sewickley, and in the eastern townships the beds are 5 to 11 feet 

 thick. 



The Upper Sewickley is the important coal bed of Noble county and 

 usually shows the triple structure. It is present in all of the townships 

 and ordinarily is of workable thickness, though varying from 20 inches 

 to 7 feet. It is best in the southern part, near the Washington border, 

 where it is known as the Macksburg coal. Along the northern line it is 

 240 feet above the Ames limestone, but near the southern line that 

 interval increases to 258 feet. In one of the eastern townships the 

 upper division of the bed is replaced by a thin white limestone, which 

 rests on the clay parting without any irregularity. The roof is a thin 

 shale, underlying a sandstone sometimes 30 feet thick. In much of 

 this 'county limestone is more abundant above the Upper Sewickley 

 than in western Belmont, notably in some of the eastern townships, where 

 it persists even to the southeast corner. Some sections show as much 

 as 30 feet. 



The Uniontown coal bed, 195 to 215 feet above the Pittsburg, is 

 reported occasionally at 103 to 113 feet above the Upper Sewickley, 

 the greatest interval being at the east on the Monroe border. It is 

 usually very thin, but at one exposure near the Monroe line it is double, 

 with 12 and 5 inches of coal, separated by 5 inches of clay. A bed 

 about 50 feet higher and exceedingly thin is reported at a few localities 

 and is very near the Wajmesburg horizon. Eed shale, 14 feet, was seen 

 at 46 feet above the Upper Sewickley in a section near the Guernsey 

 line. Elsewhere this horizon is concealed.* 



Monroe county, south from- Belmont, is east from Noble. In going 

 eastward one is in the direction of increasing intervals and increasing 

 limestones, so that the somewhat widely separated measurements seem 

 at first to be irreconcilable. 



It will be remembered that the Uniontown coal bed is persistent 

 in southern Belmont county; it is thin along the Baltimore and Ohio 



* E. B. Andrews : Vol. ii, pp. ,511, 512, 513, 518, 519, 522, 523, 524, 526, 527. 

 C. N. Brown: Vol. v, pp. 1075, 1077, 1080, 1081. 



