124 J. J. STEVENSON CAEBONIFEROUS OF APPALACHIAN BASIN 



The section below the Upper Washington limestone is not reached in 

 Morris or Jackson, but is shown in northwestern Aleppo, in western 

 Eichhill, and for the greater part in eastern Center, the distance between 

 the outcrops of the Washington coal bed being about 12 miles. The inter- 

 val between the Upper Washington limestone and the Washington coal 

 bed is about 300 feet in Aleppo, where one finds the Franklin, Middle 

 Washington, Blacksville, and Lower Washington limestones, all thin and 

 more or less brecciated. There is no trace of coal at the Canton or Jolly- 

 town horizon, but the Washington A is seen in the Aleppo section at 

 52 feet above the Washington. In southern Eichhill the Washington 

 limestone rarely becomes 2 feet, while the Franklin, 20 feet below it, is 6 

 feet thick and brecciated; this great thickness led to mistaking it for 

 the Upper Washington. The other limestones are insignificant. The 

 Canton horizon carries no coal, but a thin streak marks the JoUytown. 

 The interval between the Upper Washington and the Washington coal 

 bed is about 230 feet in southern Eichhill, but decreases northwardly 

 until, near the Washington County border, it is not more than 160 

 feet. The Washington coal bed, seen always where its place is exposed, 

 varies little from 3 feet 6 inches and is double, with a thick clay parting. 

 The Waynesburg coal bed is reached in western Eichhill, where the inter- 

 val to the Washington coal is 130 feet, as ascertained by direct measure- 

 ment in the northwest corner. This is much smaller than at localities 

 farther east along the Washington County border where the coal is 

 reached again. The insignificant Waynesburg A and B are both 

 present, but the Colvin limestone is absent. The Wa3Tiesburg sandstone 

 is massive and ordinarily rests on the Wa}Tiesburg coal bed.* 



Following the section eastward along Ten-mile creek, across Center, 

 Franklin, and Jefferson townships, one reaches the bottom of the column 

 in Jefferson. The Eogersville limestone is a constant member into 

 Jefferson, where it is 70 feet below a thick limestone which Stevenson 

 took to be the Nineveh, but which on a preceding page has been cor- 

 related at least tentatively with the JoUytown. The earlier correlation 

 may prove to be the true one, as the limestone is more like the Nineveh 

 than the JoUytown, and the interval to the Upper Washington is nearly 

 the same as at 5 or 6 miles farther north; but the persistence of the 

 Eogersville limestone and its relations to the higher limestone, nearly 

 the same as in western Center, seem to justify the tentative correlation 

 with the JoUjrfcown — the more so since the Pursley coal is persistent 

 into Jefferson. The Ten-mile limestone is present everywhere along this 



* J. J. Stevenson: (K), pp. 168-171. 

 I. C. White: (K), p. 163. 



