DETAILED STRUCTURE. 41 
rather uncertain, owing to lack of available data. West of Lone Pine 
and Amity the dip ranges from 100 to 150 feet per mile toward the 
Nineveh syncline. Farther north it becomes less steep, except 
between Kammerer and Munntown, where it is estimated to be as 
much as 100 feet per mile toward the southwest. 
NINEVEH SYNCLINE. 
This syncline was named by Stevenson in his report on Washington 
and Green counties from the village of Nineveh, Greene County, near 
which the axis passes. From that place it runs northeastward and 
enters the Amity quadrangle west of the village of Sunset. It takes a 
course averaging N. 42° E. to a point about 2 miles north of South 
Strabane post-office, whence it trends N. 10° E. nearly to Linden. 
At this place it makes another slight bend to the east, and leaves the 
quadrangle just east of Little Chartiers Creek. 
The average breadth of this trough in the Amity quadrangle is 
about 9 miles. Near Sunset, where the axis enters the quadrangle, 
the elevation of the Pittsburg coal is supposed to be about 350 feet. 
From this point the rocks rise gently to the northeast as far as Gam- 
bles, where the elevation of the coal is a little above 700 feet. Between 
Gambles and the edge of the quadrangle is a broad, rather flat, struc- 
tural area, marked by a slight dome and a similar little basin, shown 
on the map. These are determined by well records. East of Wyland- 
ville an arm of the basin extends to the east, as if to cut across the 
Amity anticline, but dies out before reaching Kammerer. In general, 
the dips in the Nineveh syncline are very gentle, but on the flank 
of the Amity anticline, between Amity and Mount Pleasant, they 
amount in places to 150 feet per mile, and on the Washington anti- 
cline they reach an extreme of 250 feet per mile for a short distance 
northeast of Washington. 
WASHINGTON ANTICLINE. 
The axis of this anticline enters the Amity quadrangle just south of 
Chartiers Creek, leaving the quadrangle half a mile west of Houston. 
The crest is broad and flat, and the coal varies in elevation from 950 
feet at the south, to nearly 1,050 feet at the north. To the southeast, 
it descends rather steeply into the Nineveh syncline. This relatively 
steep dip is interesting in view of the fact that it is along this slope 
that the famous Washington oil field is situated. Numerous oil wells 
in this section have assisted materially in the accurate determination 
of the structure. 
Throughout the quadrangle, all the folds are plunging toward the 
southwest, in conformity with the general dip toward the center of the 
Appalachian coal basin. 
