244 F\ REPORT OF PROGRESS. E. W. CLAYPOLE. 



low the same direction as the other groups and fold over 

 the eastern end of the sinking arch which runs for so long 

 ;i distance across the county, and forms for many miles the 

 boundary between Perry and Juniata counties. At the Sus- 

 quehanna river the Chemung rocks carry the arch Com- 

 pare the section of the western part of Pfoutz's valley in 

 the report on Greenwood township with the section of its 

 eastern end. See Page Plate XXIII, p. 240, Fig. 3. 



The Chemung -Cat skill, and Catskill, No. IX. 



The red sandstone and shale of this group are well ex- 

 posed in many places in this township, for example near 

 Liverpool, where a long and continuous section through its 

 upper beds may be seen along the stream forming the north 

 branch of Barger's run. This section extends with few in- 

 terruptions from the Susquehanna river to the grist mill, 

 nearly a mile and a half. As the beds dip very steep] y, at 

 an angle of about 70°, and the brook flows nearly at right 

 angles to the strike the thickness of the part of the group 

 is easily calculated. It amounts to between 6000 and 7000 

 feet. The section does not quite reach to the top of the 

 Catskill but includes the basal beds of the series, which are 

 marked here as elsewhere in the county by the occurrence 

 of layers of yellowish shale and of thin, square-fracturing, 

 fine-grained sandstone similar to that of the Upper Che- 

 mung, interbedded with red shales and sandstones. 



The group is not well exposed along the Susquehanna 

 river owing to the great erosion. 



The Catskill rocks occupy a broad belt in the southern 

 part of the township. Their southern limit lies nearly along 

 the road at the foot of Buffalo mountain and its northern 

 nearly coincides with a straight line drawn from the grist 

 mill above mentioned to a point a few hundred yards north 

 of Liberty Hall, and extended to the Susquehanna river 

 near Dry saw mill. 



Its Biirface yields good land for cultivation and is diver- 

 si Bed with bills and valleys and well watered. 



In some places near Liverpool good flagstones are quar- 

 ried from the red sandstone of this group. 



