detailed geology of claysville quadrangle. 167 
and McDonald wells. The Upper Washington coal disappears be¬ 
tween this point and the first road to the north. This coal is 18 
inches thick and was once opened on the south side of the run. In a 
* ei 7 sma ll way this bank is yet operated from time to time, the total 
pioduction from it, however, being very small. This coal bed shows 
on northern tributaries of Robinson Run. On the first road to the 
north, near the township line, it has been opened both by entry and 
by stripping. The section is as follows: 
Section of Upper Washington coal near Robinson Run. 
Ft. In. 
Shale, black_ 4 
Coal, hard and blocky_ 1 
Clay, dark blue_ 4 
Coal, shaly___ q 
On Beham Run in the extreme southwest corner of the quadrangle 
this group of limestones and coals outcrops on both sides of the valley 
for about a mile from the south border. At the point where the 
Donley and Upper Washington limestones go under cover on the 
west fork of this run these beds present the following section: 
Section of rocks on Beham Run. 
Ft. In. 
Sandstone and shale____ 
Limestone, Donley, single dark lichen-covered ledge, very tough, flesh 
colored on fresh fracture, coarse grained, with crystals of calcite_ 3 
Sandstone, coarse, yellowish, thin bedded_ 3 
Clay, yellowish to blue_ 4 
Shale, black_ 3 
Coal (Upper Washington), with thin shale partings_ 12 
Shale, black and coarse_ 2 
Clay and thin sandstones and shale alternating__ 3 
Limestone, Upper Washington: 
Limestone, white, dark gray on fresh fracture, very brittle_ 1 6 
Limestone, light yellowish, light gray on fresh fracture, fine 
grained _ 1 2 
Clay or shale, gray_ 1 
Limestone, very white, brittle, breaks in thin layers, light bluish 
gray_ 1 6 
Sandstone, thin bedded, reddish, micaceous, and shale_ 8 
Limestone (poorly exposed), in several heavy dark-blue layers, 
very hard and tough_8-9 
The Donley limestone usually occurs in two beds having a total 
thickness of 3 to 5 feet. Otherwise the section given above is char¬ 
acteristic of the beds in this vicinity. Between 25 and 30 feet above 
the Donley limestone is the Sparta coal, which is from 12 to 18 
inches thick. The coal was not seen at this point, however, its 
horizon being covered by a mantle of loose rock. 
