WESTERN COUNTIES OF PENNSYLVANIA 75 



feet thick and begins at only 848 feet below the Pittsburg coal bed, so 

 that it includes some of the Allegheny beds as well as the Mercer and 

 Upper Connoquenessing. A coal bed reported from this boring is evidently 

 at the Quakertown horizon.* 



The records in Washington and Greene counties, lying between the 

 Monongahela river and the northern " Panhandle " of West Virginia, 

 give much of interest. At Mount Pleasant, in northeast Washington, the 

 succession is 



Feet 



Sandstone 24 



Shales 22 



Sandstone 16 



Shales 25 



Sandstone .... 32 



Dark shale 10 



in all only 129 feet, and no trace of coals appears in the record. This is 

 about 10 miles southwestward from the Monongahela locality, near Pitts- 

 burg. Compared with that, this shows a notable thinning in the upper 

 part of the section. The Upper Connoquenessing is 72 feet thick at 

 McDonald's station, 4 or 5 miles north from Mount Pleasant, where the 

 other members of the section have very nearly the same thickness as 

 given above. Here the Tionesta and Quakertown horizons are marked 

 by black shale. f 



The record at Washington, about 10 miles south from Mount Pleasant, 

 is 



Feet. Inches 



Homewood .' . 87 



Coal bed, Tionesta horizon 1 6 



Upper Connoquenessing 81 6 



Shales 93 



to the Lower Carboniferous limestone. Here the Homewood is at but 

 5 feet from the Ferriferous limestone, though the interval at Mount 

 Pleasant is 111 feet, so that the increase is at the expense of the Alle- 

 gheny beds; the Connoquenessing has increased at the expense of the 

 Mercer shales, while the lower beds have lost their characteristics, and 

 at best must be very thin, for much of the bottom shales must belong to 

 the Shenango. 



At Waynesburg, in Greene county, somewhat more than 20 miles south 

 from Washington, the record is 



Feet 



Homewood sandstone : 65 



Mercer shale 35 



* J. F. Carll : Report (1 5), pp. 213, 219, 225, 322. 



j-I. C White : West Virginia Geological Survey, vol. i, 1899, pp. 218, 219. 



