NORTHERN AND WESTERN OUTCROP IN OHIO 85 



An oil-well record in northern Jefferson, south from Columbiana, 

 shows two coal beds at 111 and 150 feet below the Lower Kittanning 

 coal bed, which evidently are the Mercer coals, but the Mercer limestones 

 are missing.* 



An oil-well record in West Virginia opposite Steubenville, Ohio, shows 

 neither coal nor limestone in the Pottsville, unless the coaly matter at 

 the bottom be taken as representing the Sharon coal bed. There, as at 

 Steubenville, the Pottsville is a massive sandstone. Borings in Belmont 

 county, south from Jefferson along the Ohio, show a somewhat similar 

 condition, for in the 350 feet above the Lower Carboniferous there is 

 only sandstone broken just above the middle by 30 feet of shale. It is 

 clear that the coals and limestones are lacking in eastern Jefferson and 

 Belmont counties as well as in a great part of Columbiana, f 



Unfortunately there are no data available now for Harrison county, 

 west from Jefferson and north from Belmont, but Stevenson reports 

 some records of borings in Carroll county, north from Harrison, which 

 show a limestone and coal bed at from 18 to 45 feet below the coal bed 

 underlying the Putnam Hill limestone. The limestone is the Upper 

 Mercer. The same observer states that the Upper Mercer limestone is 

 reached in exposed sections within Guernsey county, between Belmont 

 and Muskingum, and that the underlying coal is a cannel ; but at 

 Cambridge, in the central part of the county, a well record shows no 

 trace of coal or limestone in 365 feet above the Lower Carboniferous, 

 while in the eastern part of the county the first trace of coal is at 220 

 feet above the Lower Carboniferous. This underlies a fossiliferous 

 black shale which may represent a limestone, perhaps the Putnam 

 Hill.J 



Returning now to the west and passing southward from the Ohio 

 Central railroad, one finds in the central part of Muskingum county a 

 measurement by Professor Orton which shows the intervals between 

 the Putnam Hill limestone, the Lower Mercer, and the Sharon coal beds 

 to be 80 and 70 feet. 



The Pottsville extends in isolated patches westward beyond Muskin- 

 gum almost half way across Licking county. There Mr Read found 

 the Sharon sandstone represented by conglomerate sometimes 15 feet 



* J. S. Newberry : Vol. iii, p. 741. 



fE. Orton : Vol. vi, pp. 338, 405. 



J J. J. Stevenson : Vol. iii, pp. 195, 221. The measurements by this observer were made in 1871 

 and 1872, but not published until 1878. The Pennsylvania terms were not used in his reports. 

 They have been applied here, as also in the extracts from reports of other members of the survey 

 during its earlier years. 



E. Orton : Vol. vi, pp. 378, 381. 



XII— Bull. Geol. Soc. Am., Vol. 15, 1903 



