154 OIL AND GAS; OHIO, WEST VIRGINIA, PENNSYLVANIA. 
The Uniontown coal is represented by a few inches of coal or 
carbonaceous shale. 
The Benwood limestone outcrops along both sides of Chartiers 
Creek from the edge of the quadrangle to Oak Grove, where the 
steep westward dip carries it under cover. It is exposed on both 
sides of the northern tributary to Chartiers Creek to a point half a 
mile above Arden Mines. On this run, a short distance below Arden 
M ines, a coal a few feet below the Benwood limestone was once 
opened for mining. This is probably the Sewickley coal, since it 
lies between 130 aftd 140 feet above the Pittsburg coal. 
The Pittsburg coal comes to the surface in the valley of Chartiers 
Creek a quarter of a mile east of the quadrangle boundary, in the 
Amity quadrangle, where it is extensively mined. This coal is 
opened by shaft at Arden Mines, but to the southwest along Char¬ 
tiers Creek it dips steeply to the bottom of the Finney syncline west 
of Woodell. 
CANTON TOWNSHIP, WASHINGTON COUNTY. 
The axis of the Finney syncline enters Canton Township near the 
southwest corner, the rocks along the trough lying almost horizontal 
to the vicinity of Woodell, whence the axis of the syncline swings 
sharply to the north, passing into Chartiers Township 1 mile north 
of the mouth of Georges Run. At this point the key rock is about 
190 feet higher than it is at Woodell. From the bottom of this 
trough the rocks rise steeply in all directions. The thickness of the 
outcropping beds is about 500 feet, that portion of the geologic col¬ 
umn’ exposed including the rocks from the Benwood limestone up to 
the Claysville limestone. 
Upper Washington limestone and coal , Donley limestone , and 
/Sparta coal .—This group is not found in Canton Township north of 
the Buffalo-Washington pike unless a few scattering bowlders on the 
crest of Garrett Hill belong to the Upper Washington limestone. On 
the ridge south of this pike the Upper Washington limestone is in 
fine outcrop at the township line east of North Buffalo Church. 
From this point eastward a rather broad strip along the ridge is 
underlain by these beds to a point within a mile of Wolftown. 
Farther east small isolated patches of the Upper Washington lime¬ 
stone occur under the higher points. Southward along the higher 
ridge between Canton and Buffalo townships the outcrop line of the 
Upper Washington limestone sinks abruptly to the trough of the 
Finney syncline. At the tunnel on the Baltimore and Ohio Railroad 
under Sugar Hill this limestone is only a few feet above the track, 
the heavy ledges of what is probably the Donley limestone beimr 
above the roof of the tunnel. Here the Upper Washington coal lies 
directly above the top beds of the Upper Washington limestone, as 
