DETAILED GEOLOGY OF BIJ RGETTSTOWN QUADRANGLE. 121 
1) aynesburg " A ” coal .—Along the Eldersville ridge road both 
east and west of Lee schoolhouse the Waynesburg; “ A ” coal out- 
crops 55 feet above the top of the Waynesburg coal. 
11 aynesburg coal .—Throughout most of the township the Waynes¬ 
burg coal is near the summit of the ridges. The ridge roads cross 
and recross its outcrop many times in all parts of the township. 
The coal has a thickness of over 2 feet and makes a very prominent 
blossom on the roads. It has been opened for mining at one place 
on the north side of the ridge road 3 miles east of Eldersville, but 
the bank is abandoned, partly owing to the poor quality of the coal. 
In the following table will be found results obtained by comparing 
the elevation of the top of the Waynesburg coal with the base of the 
Pittsburg coal, and also with the top of the Bulger limestone. 
Distance from base of Pittsburg coal and top of Bulger limestone to Waynes¬ 
burg coal, Jefferson Township , Pennsylvania. 
Locality. 
Bulger to 
Waynes¬ 
burg. 
Pittsburg 
to Waynes¬ 
burg. 
Crossroads south of Dinsmore. 
Feet. 
104 
Feet. 
273 
At Lee schoolhouse. 
270 
Outcrop near Sanky Well No. 1. 
275 
Road to west from south end of Eldersville. 
281 
At head of Scott Run. 
105 
North of Bethel Church. 
120 
280 
Outcrop near Gillespie Well No. 1. 
125 
291 
Average. . 
113 
278 
Uniontown coal , Benwood limestone , and Sewickley coal .—The 
ledges of the Benwood limestone, with the Sewickley coal below and 
the Uniontown coal above, show in all parts of the township. Neither 
the Sewickley nor the Uniontown coal is of any importance beyond 
that of a geologic marker. These coals are not over 1 foot thick, 
and they are usually represented by but a few inches of bituminous 
shale. 
The Dinsmore white limestone is especially well developed. 
There are more thick beds of limestone than usual in this part of the 
quadrangle, which makes it somewhat doubtful if the same heavy 
bed is selected each time for determining the distance to the Pitts¬ 
burg coal. 
The Bulger limestone has not the prominence and clear crystalline 
appearance here that it has in the vicinity of Bulger and throughout 
the eastern portion of the quadrangle. In Jefferson Township it is 
an earthy limestone, having the appearance of hard dark-green shale. 
It maintains it position, however, directly above 20 feet or more of 
soft green shale. The heavy blue bed near the top of the Benwood 
limestone is prominent in the vicinity of Eldersville. 
