DUNKAKD FORMATION 103 



county, and thence southward it appears in every section, exposing its 

 place in Pennsylvania until very near the West Virginia line. A lime- 

 stone in Maryland has been correlated with this bed; the interval to the 

 Washington coal bed, 192 feet, seems excessive, in view of changes in 

 lower intervals in that direction, but no comparison can be made directly, 

 as a gap of about 70 miles separates exposures. This limestone disap- 

 pears southwardly very soon after entering West Virginia, and it cannot 

 be recognized with any certainty in any of the long sections along the 

 Ohio river south from Moundsville, West Virginia, where it is 244 feet 

 above the Washington coal bed. In some of those sections, however, a 

 red bed, with limestone nodules, is very near the place of this limestone. 



The Upper Washington is flesh-colored, blue, and dark gray in its 

 several portions, but all alike weather to an almost snowy white faintly 

 tinged with blue ; much of it is very pure and several of its layers waste 

 very slowly on exposure. These features make the bed an unmistakable 

 stratigraphical guide from its most northerly exposure to beyond central 

 Greene county, as well as in the portions of Fayette county in which its 

 place is reached. At the extreme north the bed is thin, but thickens 

 southwardly to central Washington, where it is a mass of limestone and 

 calcareous shale 20 to 30 feet thick. Along the southern border of the 

 county it is 8 to 12 feet, and in Greene county, where the middle or dark 

 portion has disappeared, it seldom exceeds 3 feet. 



The coal beds in this interval are unimportant. 



The Washington A coal bed (J. J. Stevenson, 1876), between the 

 Blacksville and Middle Washington limestones, was supposed at the time 

 it was described to be confined to three townships of southeast Greene 

 county. There it is an alternation of coal and shale 3 to 4 feet thick 

 and possessing no value. It is a fairly well marked horizon elsewhere, 

 showing black shale at many places in eastern Greene and coal in two 

 tovmships on the west side of the county, the only ones exposing its place. 

 Occasionally one finds a coal streak in Washington county at varying 

 distances below the Middle Washington limestone which may or may not 

 be contemporaneous in part with the deposit of Greene county. 



The JoUytown coal bed (I. C. White, manuscript, 1875; J. J. Steven- 

 son, 1876), named from a village in southwest Greene county of Penn- 

 sylvania, is 25 to 40 feet below the Franklin (V) limestone in eastern 

 and southern Greene, but is irregular in the northwest part of the county, 

 where its place is reached again. It is distinctly present in Amwell 

 and Franklin townships of Washington, into which it was traced from 

 Greene county, and a blossom or thin coal marking this horizon was seen 



