174 OIL AND GAS; OHIO, WEST VIKGINIA, PENNSYLVANIA. 
creeks and at the head of Rocky Run east of Gale. Just north of 
Sparta, on the Day farm, it is 18 inches thick and has been mined in 
a small way by stripping. As a rule, however, the coal is thin and its 
quality so poor that extensive operations are unprofitable. This coal 
outcrops on the road from Sparta to Mount Zion Church, at the 
point where the road leaves the valley to ascend to the top of the 
ridge. It probably outcrops on both sides of the valley from Sparta 
to Old Concord and is the bed exposed at several places along the 
road from Old Concord to Gale. . 
Upper Washing ton limestone .—At no point within the portion of 
Greene County shown on the map does this bed come to the surface, 
but in Washington County it outcrops on both sides of the valley of 
Tenmile Creek from its source to the east edge of the quadrangle. 
The trough of the Nineveh syncline crosses this stream near its 
junction with Short Creek, where the Upper Washington limestone 
lies in the bed of the creek. Here the bottom of the trough is wide 
and for half a mile both up and down the stream the rocks are 
practically level. At Lindleys Mill the limestone is 60 feet higher. 
From this place to Prosperity it barely keeps above the bottom of the 
valley, but from that point to the north, northwest, and west the 
rise is so steep that at the township line on Tenmile Creek the lime¬ 
stone is 100 feet above the stream, and near the sharp bend in the 
road to the south from Crafts Run near the old McDowell mill site 
it is about 110 feet above the valley. From this outcrop westward 
the strike of the rock is almost parallel with the course of the stream, 
the limestone being exposed in the valley a short distance northeast 
of the Joint schoolhouse. On Short Creek the Upper Washington 
limestone is barely under cover from its mouth to the village of 
Sparta, where it shows in the bed of the stream for a few hundred 
yards. Halfway from Sparta to Old Concord the Hogue Avell shows 
this limestone 13 feet from the surface. On the road to the north, 
near the parsonage at Old Concord, a limestone outcrops, which is 
probably the Upper Washington. On the road to Mount Zion 
Church from Sparta the limestone goes under cover m the run oppo¬ 
site the second house to the west of the road. Here the black mottled 
ledges of this bed are finely exposed. To the north of Tenmile 
Creek the Upper Washington limestone does not outcrop again in 
Morris Township, unless it comes to the surface in the bed of the 
run for a few hundred yards at the township line south of the Cross- 
loads schoolhouse and also for a short distance on the next run to 
the south. 
Middle Washington limestone and Joily town coal .—At the point 
where Tenmile Creek crosses the north boundary of Morris Town¬ 
ship, Washington County, the Middle Washington limestone is only 
