74 J. J. STEVENSON — CARBONIFEROUS OF APPALACHIAN BASIN 



Above the white Homewood are 65 feet of gray sandstone, extending to the 

 Ferriferous limestone. The coal bed of the record is evidently the Sharon, 

 and the bottom of the Potts ville is just below it, as the shales are She- 

 nango and the sandstone Logan. The condition is similar at Murrays- 

 ville, 10 miles farther south, where the succession is 



Feet 



Homewood sandstone 55 



Mercer shales 20 



Upper Connoquenessing 75 



Quakertown shales with sandstone and coal 20 



Lower Connoquenessing 50 



Sandy shales. 30 



to the Lower Carboniferous limestone which has made its appearance in 

 the interval. The bottom shales are very black in the upper 10 feet, 

 which may be taken as representing the Sharon coal bed, thus giving for 

 the thickness of Pottsville 230 feet. No trace of the Tionesta or Mercer 

 coals appears in the record. This record is of especial interest, as it is 

 about one-third of the way eastward from Pittsburg to the Conemaugh 

 gap, where only the upper part of the section is present. 



Five or 6 miles farther south in Westmoreland county the record is 



Feet 



Homewood 85 



Mercer shales and " shells " 80 



Upper Connoquenessing 40 



Coal bed, Quakertown horizon 4 



Sandstone and shale , 55 



resting on 85 feet of " Buttermilk sand," evidently the limestone. The 

 Homewood has increased at expense of the overlying rocks, while the 

 Connoquenessing sands are decreasing. The change continues south- 

 ward for 6 or 7 miles farther. The record is 



Feet 



Homewood 135 



Mercer shale, black 30 



Upper Connoquenessing, white 30 



Quakertown shale, black 25 



Lower Connoquenessing, white 20 



Sharon shale, black 15 



giving only 120 feet as total thickness of Pottsville below the Homewood. 

 At barely a mile away the Homewood is but 48 feet, and the Connoque- 

 nessing sandstones have come together with a thickness of 80 feet. 



A record in southern Fayette, within 8 miles of the West Virginia line, 

 shows the same conditions, but exaggerated, for the Homewood is 160 



