104 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



in several other townships. Failure to recognize the Franklin limestone 

 in this county led Stevenson to confound the Canton horizon with this 

 at a number of localities. The bed is present in Fayette county oi 

 Pennsylvania, biit it is not the Jollyto-noi coal of Maryland, which is 

 higher in the column. Some confusion has existed respecting the proper 

 application of this name, due to omission of part of the section at Jolly- 

 town, so that in reading the text as published* one might easily imagine 

 that Limestone V and Limestone IX of two sections there given may be 

 the same; but the full measurements taken from the original notes as 

 given on a succeeding page make the matter wholly clear. This coal 

 bed is always thin, seldom even 2 feet thick, but it is apparently con- 

 tinuous under an area of several hundreds of square miles, as it is never 

 absent where its place is exposed. It is certainly continuous southward 

 into Monongalia and Wetzel of West Virginia, but it is absent from the 

 published sections within Marshall of that state. There are two thin 

 coal beds in southwest Greene within a vertical space of 55 feet, the Jolly- 

 town at about 50 feet below the Upper Washington limestone and the 

 Boyd just above that limestone. The disappearance of the limestones 

 makes it difficult to determine which of these beds persists. In the suc- 

 ceeding pages a bed at Bellair, Ohio, is taken to be the Joll}i;own; it is 

 183 feet above the Washington coal bed. At Moundsville the Upper 

 Washington limestone is 244 feet above that coal bed, and at Bellair the 

 interval should not be more than 210 feet. Evidently the same bed is at 

 Baresville, in Monroe county of Ohio, and Liberty, in Washington county, 

 at 149 and 140 feet above the Washington. Oil-well records give in- 

 formation respecting the distribution of the bed in the deeper parts of 

 West Virginia, and its place is concealed in Doctor White's sections along 

 the Ohio river. 



The Canton coal bed is wholly insignificant and without interest except 

 in respect to its distribution. It is confined to Washington county of 

 Pennsylvania, where, in the central and western parts, one usually finds 

 a thin streak of coal at 12 to 30 feet below the Upper Washington lime- 

 stone. The thickness is usually less than 1 foot and the bed disappears 

 westwardly in the West Virginia panhandle at little more than a mile 

 from the state line. No trace of this deposit was seen in Greene county. 



The variations in the interval between the Washington coal bed and 

 the Upper Washington limestone resemble those observed in the interval 

 below. The numerous elements of the section make the tracing com- 

 paratively simple. At the extreme northern exposure of the whole in- 



* Pennsylvania reports, vol. K, p. 111. 



