266 V 



REPORT OF PROGRESS. E. W. CLAYPOLE. 



with loose blocks of Oriskany sandstone or traversed by 

 Oriskany ridges. 



The Perry county fault is a conspicuous feature in the 

 geology of the township. Entering from Centre it passes 

 along the north foot of Dick's hill, and then suddenly 

 diminishing continues with less and lessening throw across 

 the township to the river. Its effect in the western part of 

 the township is to bring the Lower Helderberg limestone 

 against the Chemung shales. Further east the Hamilton 

 sandstone comes against the Chemung, then the Hamilton 

 up pei- shale until finally by the development of a second 

 and parallel fault to the northward, the outcrop of the Ham- 

 ilton upper shale is thrown so far south that the Chemung 

 is altogether cut out before it reaches the river, and the two 

 outcrops of Hamilton upper shale meet round the end of 

 the syncline in or about the river, and the Perry county 

 fault disappears. To trace its exact course and throw across 

 the fiat low ground near the river is, however, difficult, and 

 the above description may therefore be inaccurate in some 

 of its minute details. 



The Lower Helderberg limestone, No. VI. 



Three distinct outcrops of this limestone occur in Miller 

 township. The first and most northerly is a very narrow 

 anticline coming in from Oliver and passing a few hundred 

 yards north of the washer at the iron ore works. It scarcely 

 shows more than the very highest beds, such as the flint 

 bands, and dies out about the middle of the township. It 

 is (he continuation and ending of Limestone ridge, or at 

 Least of that part of it lying on the north slope of Inoculate 

 hill between Bloomiield and Newport. 



The second outcrop is parallel with the first and is a con- 

 tinuation of tic two limestones on the north and south sides 

 of the vale of Bloomfield. These unite near the township 

 line owing to the disappearance of the red shale, which sinks 

 below tin' surface to the eastward, and pass along as a single 

 anticlinal outcrop to the Juniata river. Numerous quar- 

 ries, Large and small, have been opened in it. Most of these 



