MONONGAHELA FORMATION 75 



A "Cement" limestone is persistent at 70 to 80 feet below this coal. 

 The interval to the coal bed, Number 7, is roundly 170 feet. The 

 bottom coal bed and its magnesian limestone are shown along the creek 

 into Adams township, where Professor Andrews gives another section, 

 showing the red beds of Center and the three coal beds, 74 and 96 feet 

 apart, the total interval being 170 feet, with the magnesian limestone 

 at 85 feet below the bottom bed. The limestone goes under soon after 

 entering Salem township, but the coals remain above, and at a mile 

 from the Ohio river Professor Andrews finds the three beds as before, 

 70 and 100 feet apart, the middle one being 3 feet 6 inches, making 

 the total interval 173 feet 6 inches. At the mouth of the creek, at 

 Clarington, Doctor "White's section shows the red beds on top, with the 

 three coal beds 65 and 98 feet apart, the whole interval being 166 feet, 

 and, according to Professor Andrews, the magnesian limestone was 

 reached there in a shaft at 75 feet below the lowest coal bed. 



All the conditions point to correlation of this lowest bed with the 

 TJniontown. The relation to the magnesian limestone is that shown by 

 the TJniontown in southern Belmont. At the mouth of Pike creek, 

 in southern Belmont, the Uniontown is 55 feet below the Waynesburg 

 and 179 feet below the Washington. It is about 100 feet below the 

 Waynesburg A. Evidently the Wa3'nesburg coal bed is wanting or so 

 thin as to have no observed trace except in Center township, where, at 

 60 to 55 feet above the Uniontown coal bed, there is a bed of fireclay ■ 

 known as the "potters' bed," which sometimes carries a trace of coal, 

 and in Perry township, where the record of an oil boring shows trace of 

 coal at 240 feet above the Pittsburg. The Uniontown coal bed retains its 

 peculiar structure to the Ohio river. It resembles the structure of 

 the same bed in eentral West Virginia along the Baltimore and Ohio 

 railroad. 



The Uniontown coal bed is recognized southward in Greene and Perry 

 townships, in each case triple, with the characteristic plant bed, but much 

 reduced. Along the Ohio river the interval to the Washington increases, 

 being 190 feet at Sardis and 191 at Baresville, both in the township south 

 from Salem. This increase of interval is in accord with measurements 

 in Tyler county of West Virginia and is evidenced by an intermediate 

 measurement reported by Doctor White, which gives 125 feet as the inter- 

 val between the lower coal beds. The Uniontown grows thinner south- 

 wardly along the Ohio, being only 2 feet at Baresville, while still farther 

 south it seems to be wanting; for in a section by Professor Andrews its 

 place is exposed at 188 feet below what certainly seems to be the Wash- 

 ington, but no trace of coal appears. 



