CHAPTER V. 
(GENERAL GEOLOGY OF THE CLAYSVILLE QUADRANGLE. 
DESCRIPTION OF SURFACE. 
LOCATION. 
The Claysville quadrangle lies directly south of the Burgettstown 
quadrangle, between meridians 80° 30' and 80° 15' west and 
parallels 40° and 40° 15' north. The territory lies within the bound¬ 
aries of Washington and Greene counties, Pa., only a narrow strip 
along the southern border being in the latter county. 
TOPOGRAPHIC FEATURES. 
This quadrangle lies wholly within the basin of Ohio River. 
Roughly, the eastern third is drained at the north by Chartiers Creek 
into the Ohio at Pittsburg, and at the south by Tenmile Creek east¬ 
ward to Monongahela River. Streams in the northwestern quarter 
of the quadrangle drain through Buffalo Creek into the Ohio at 
Wellsburg, W. Va. In the southwestern quarter, Robinson, Temple¬ 
ton, and Rocky runs carry the drainage through Wheeling Creek to 
Ohio River at Wheeling. 
The topography made by these streams is of the same general 
type as that already described for the Steubenville and Burgettstown 
quadrangles. The height of the hills above the main streams is from 
200 to 400 feet. 
GEOLOGIC FEATURES SHOWING AT THE SURFACE. 
SECTION OF ROCKS EXPOSED. 
The outcropping rocks of the Claysville quadrangle belong to 
the Permian and Pennsylvanian series. Of the former, there are 
about 500 feet of the Greene formation and the entire thickness (275 
feet) of the Washington. 4he Pennsylvanian series is represented 
by about 300 feet of the Monongahela, including the rocks down 
to a bed a few feet above the Pittsburg coal. The rocks are all of 
sedimentary origin, being principally sandstones and shales, which 
carry at irregular intervals beds of limestone and coal. Of these 
beds the Claysville and Prosperity limestones of the Greene forma- 
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