FAULTS OF PERRY COUNTY. F 2 . 85 



for about 2i miles, when the ground suddenly changes from 

 Chemung shale to No. VI limestone. 



2. Old road to Carlisle. The same result is obtained 

 along this line. At about 2 miles from New Bloomfield is 

 a small roadside cutting showing Chemung shale, and at 

 about 100 yards farther on is an indistinct but manifest 

 Oriskany ridge. Between the two is a narrow strip of 

 Lower Helderberg (No. VI) limestone. 



3. West road to Gibson's Rock.. At about two miles 

 and a half from New Bloomfield the Portage beds (Cardiola 

 shales,) dipping at nearly 90°, crop out on the roadside, and 

 within 100 yards the road passes over the Oriskany sand- 

 stone near Mr. S. Brown's house. 



4. Road to Montebello narrows. This road running 

 almost due east passes over a great distance of Chemung 

 shales, rising to a higher horizon than either of the roads 

 already mentioned. But on turning to the south at the 

 entrance to the narroAvs two cuttings, only 150 yards apart, 

 show the one Chemung shales and the other Lower Helder- 

 berg limestone. 



5. Road from Perry furnace to Gibson's rock. The 

 old Perry furnace lies upon the Lower Helderberg lime- 

 stone. The Oriskany sandstone does not make any con- 

 spicuous ridge along this road. But at a few hundred feet 

 south of the furnace the base of the Hamilton sandstone 

 is seen, and passing through the narrows its upper limit 

 may be easily detected. Following this, at a distance of 

 about 400 feet comes in the Oriskany sandstone, forming a 

 distinct ridge of rocks. The fault, therefore, comes through 

 in this interval, bringing Lower Helderberg limestone in 

 contact with Hamilton upper shale. 



The throw here is less than further east, not exceeding 

 1650 feet, measured at right angles to the beds, or 2300 feet 

 if measured vertically. 



6. Road to Losh's run, (Polecat road and Ohio wharf 

 road.) This road strikes the line of fault about 6 miles east 

 from New Bloomfield. The exposures are not quite so strik- 

 ing as in the places already mentioned, but the fault is 

 quite as conspicuous. Chemung shales occupy the ground 



