DETAILED GEOLOGY OF CLAYSVILLE QUADRANGLE. 173 
portion of Morris Township, Greene County, included in the quad¬ 
rangle to the south of this line will be discussed. 
The axis of the Nineveh syncline enters the quadrangle from the 
south, about 1 mile west of West Union, trends north-northeastward 
to the eastern boundary of the quadrangle, near the Crossroads school- 
house. The rise of the rocks from this trough is steep in both direc¬ 
tions, the greatest ascent being toward the dome on the Washington 
anticline lying southeast of Pleasant Grove, near the corner of East 
Finley, Morris, and South Franklin townships. The maximum dif¬ 
ference in level of the key rock within the area is about 285 feet. 
The geologic section outcropping ranges from a bed a few feet below 
the Middle Washington limestone upward through the remainder of 
the Washington formation and about 500 feet of the Greene for¬ 
mation. 
Nineveh limestone and coal. —At a number of places on the high 
ridge between Washington and Greene counties a foot or more of coal 
and black shale, from 10 to 15 feet above a rather heavy bed of white 
to cream-colored limestone, was found well up toward the top of the 
hill. Owing to the ease with which these beds are recognized and 
their frequency of outcrop in an east-west line, they make valuable 
geologic markers. The distance of the coal above the Upper Wash¬ 
ington limestone can not be very accurately determined, but it is 
approximately 325 feet. This is about the horizon of the Nineveh 
coal and the Nineveh limestone, though this correlation is by no 
means positive. North of Tenmile Creek the high ridge from Find¬ 
leys Mill to Van Buren catches these beds only at the point where it 
is crossed by the trough of the Nineveh syncline. The coal was noted 
at the forks of the road to the north of the schoolhouse on this ridge 
and again near the first forks of the road about the same distance to 
the south of this schoolhouse. At both places the bluish to cream- 
colored beds of the Nineveh limestone were seen. 
Upper AY ashing ton coal , Donley limestone , and Sparta coal. —The 
Upper Washington coal is usually represented by thin layers of black 
shale containing streaks of coal. It is subject to abrupt changes, 
however, and at the forks of the road near the Hogue well, one-half 
mile east of Old Concord, it is as much as 14 inches thick. Near the 
head of Crafts Run one outcrop of this coal 3f feet thick was noted. 
This is the maximum measurement obtained in the Claysville quad¬ 
rangle. The outcrop of the Donley limestone is everywhere closely 
associated with that of the Upper Washington limestone. In this 
region the beds are not over 35 feet apart. Along Short Creek the 
Donley limestone is separated from the Sparta coal by a massive 
sandstone bed from 10 to 25 feet thick. The Sparta coal comes to the 
surface only along the sides of the valleys of Short and Tenmile 
