114 J. J. STEVENSON CARBONIFEROUS OP APPALACHIAN BASIN 



It is wholly probable that some portion of the Dunkard column remains 

 within the Greensburg trough of northern Westmoreland, but no correla- 

 tion of the imperfectly exposed beds can be made. 



The lower beds of the Dunkard are present in western Westmoreland 

 almost to the Kiskiminetis river at the north, but no exposures are noted 

 until near the Payette border at the south. The Washington coal bed 

 underlies the Lower Washington limestone and varies from 5 to 9 feet, 

 in the latter case having almost 8 feet of coal in 8 benches. It is 135 

 feet above the Waynesburg coal bed, and the Waynesburg A, 3 feet 

 below the bright yellow Colvin limestone, is 55 feet above the lower coal 

 bed. Small patches in northern Payette occasionally show the Waynes- 

 burg A and Washington coal beds with the Lower Washington lime- 

 stone, but the important area is farther south, in Bedstone, Luzerne, and 

 German townships, where one has surface observations supplemented by 

 detailed shaft records. A massive sandstone was seen in Eedstone, 330 

 feet above the Waynesburg coal and only a few feet above a thin coal bed 

 correlated with the Jollytown. It is like that underlying the Upper 

 Washington limestone at some places in Washington and much of 

 Greene, so that the correlation is probably correct. The Washington coal 

 bed in these townships, from 3 to almost 6 feet thick, is always multiple 

 and yields poor coal, rich in ash and sulphur. The Lower Washington 

 and Blacksville limestones are usually present, and the Colvin limestone, 

 with the Waynesburg A coal bed below it, is always shown where its place 

 is exposed. The Waynesburg sandstone is prominent, though sometimes 

 replaced in part by sandy shale ; ordinarily it rests on the coal, the Cass- 

 ville shale having been removed.* 



The irregularity of the coal beds and the ease with which one depend- 

 ing only upon imperfect road exposures may be deceived are shown by 

 comparison of the Brier Hill and Lambert records, the former in Red- 

 stone and the latter in German township: 



Feet Inches Feet Inches 



1. Washington A coal bed, clay, sandstone 18 9 13 



2. Sandstone, shale, thin limestone 22 6 27 7 



3. Coal bed Thin 5 



4. Clay, limestone, calcareous clay 8 5 9 2 



5. Coal bed 3 2 3 



6. Sandstone, shale, thin limestone 22 8 27 11 



7. Washington coal bed 4 2 5 



8. Clay and sandstone 11 8') 



9. Little Washington coal bed 3 (■ 31 11 



10. Shale 25 0) 



* J. J. Stevenson: (K 2), pp. 154, 178, 211, 226, 227, 229, 231, 259, 273, 356-359, 365, 

 366, 381. 



