far inferior in length and throw to the Perry County fault it yet produces 
much complication and several noteworthy changes in the topography and. 
landscape. } 
The most westerly point at which I have been able to detéct the fault 
| is on the hill west of Little Germany, where it produces a fork in the Oris- 
Claypole. 224. April 20, 
kany sandstone, one ridge continuing on its previous course, while the 
other diverges slightly to the southward. The latter thrown up by the 
fault is cut off at a short distance, the ridge terminating in a field. \ 
| In thus bringing up the Oriskany to the surface, the dislocation has also 
brought up the Lower Helderberg limestone adjoining it, and the result is 
that limestone has been quarried and burnt at one place, while at the 
distance of about 100 feet northward, or geologically speaking below it, lies 
Fra. 5. 
Map of the Hastern Hind of the Perry 
County Faults. 
il H. 1. Hamilton sandstone and Lower shale. L. Limestone. 
H. 2. Hamilton Upper Shale. EB. F. Fault. 
O. Oriskany, &c. C. D. Fault. 
the Marcellus Black shale with no intervening Sandstone ridge. The 
Marcellus thus occurs on both sides of the narrow belt of limestone. Fol- 
lowing the line of fault a little farther to the east, we find the Lower Ham- 
ilton shale brought up on the south side against the Marcellus on the 
north, and farther yet the lower shale, about 500 feet thick, occupies both 
sides of the fault. As we approach the township line, which lies on the 
watershed parting the south fork of Montour run from the tributary of the 
Little Juniata, a high connecting ridge of Lower Hamilton shales rises on 
the south side of the fault, exposing the Marcellus at its base, into which 
|| a tunnel six feet square in section has been driven in search of coal, 
