164 OIL AND GAS; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
Donley and Upper If ashing ton limestones. — I lie tops of the Donley 
and Upper Washington limestones are from 40 to 55 feet apart in 
Donegal Township. They underlie a narrow strip along the top 
of the ridge between Buck Run and Dutch Fork, from the high 
bluff south of Buffalo Creek to the top of the dome north of Clays- 
ville. West of Dutch Fork, owing to the westerly dip of the rocks, 
these beds outcrop lower down on the hillsides, and are present under 
a considerable area along the west border of the quadrangle from 
Doo- Run to the Baltimore and Ohio Railroad, both beds going under 
cover near the point where the railroad crosses the west boundary 
of the quadrangle. At Coon Island the outcrop line of the Upper 
Washington is about 165 feet above the village. It encircles the head 
of the southern tributary of Dutch Fork, caps the high hill to the 
southeast of the village, and outcrops along the heads of both the 
northern and southern tributaries of Dutch Fork eastward to the 
tunnel at the divide beyond Claysville. At this tunnel the Upper 
Washington coal lies directly above the top layers of the Upper 
Washington limestone, and but 10 or 15 feet of blue and brown shale 
lies between this coal and the Donley limestone above. 
Jollytown coal and Middle and Lower Washington limestones .— 
The Jollytown coal in this township consists of less than a foot of coal 
and shale, and occurs from 5 to 25 feet above the Middle Washington 
limestone. The Middle Washington limestone is much thinner and 
the individual beds are less massive here than in Independence and 
Hopewell townships. In several places the limestone does not .show, 
and in onty a few exposures could it be positively identified. The 
Lower Washington limestone occurs in two benches separated by 
1 to 5 feet of shale, each bench being made up of one heavy layer 
from 1 to 2 feet thick, accompanied by one or two thin layers, the 
total thickness of the bed varying from 5 to 20 feet. This limestone 
overlies the Washington coal at a distance of 15 to 35 feet, and is 
always present where this coal outcrops. 
Washington coal. —The outcrop line of the Washington coal 
extends on the hillsides well up toward the heads of the small trib¬ 
utaries of Buck Run, Buffalo Creek, and Dutch Fork. In Dog Run, 
southeast of Dunsfort, the coal goes under cover at a small waterfall 
made by projecting ledges of the Lower Washington limestone. At 
this outcrop the Washington coal, which is about 5 feet thick, is 
broken only by relatively thin partings of shale and appears to be of 
a better quality than usual. This is the general condition of the bed 
at all points at which it was examined on Buffalo Creek and Buck Run. 
South of Budaville, on Dutch Fork, the coal occurs in two benches, 
divided by 3 to 5 feet of yellowish shale. About 1 mile north of Coon 
Island the coal has been opened in a number of places and its condi¬ 
tion is about the same as on Dog Run. From this point the rise of 
