© 
1884.] 493 [Claypole, 
Section of the Rocks in Perry County correlated with the Clinton Group of 
New York. 
Fossil haematite and limeston@....1.s cece eeeeeeee 2 feet. 
POHRCLEO Okereienuibovionalvtt PU VM We dea L Mieeieretele erry © acuuags bebe beet lone. 
PIEOMathte voici ee ye Lenore alee Wate nees Bl aialbreheyelGF slonal ay 1 Hear 
MCLE OC La leis vii Cicate wood rae aia wien te Pe PN UR he SOs ia 
Shale, green.......-. vowing hOOss a4 
+ | Iron sandstone........% i S23! 
Upper green shale MV ORRLCOUEN Veen sinners eas wal ate 
| Shale, green. ......66: 00 Nee UUM a 
TROr BHHOSHOMO sh seine sll nena pie erties aes 
FArGerORsil DlVOOk OnE Vey tie ss Oe anes PRS Cae (earn ea Bos 
Lower green shale.......cseeeeeeeenees Naas ate OOO a 
989 
Medina sandstone. 
The thickness here assigned to the different beds is not a constant 
quantity, and the diagram does not represent any actual section. It is, 
with this exception, accurate wherever the whole series crops out in the 
county. The measurements have been taken or estimated where it was 
possible to obtain them, and the details may be found in the forthcoming 
report on Perry county. 
ComMPARISON WITH THE Criinvon Rocks or New York. 
Ets New York. Ft. Perry Co., Pa. 
18.4 Limestone. 2 Limestone and hematite. 
5 Sandrock 
1 Hematite. 
Tron Ore. 5 sandrock. 
24.0 Upper green shale. 363 Upper green shale and fossil 
ore. 
15.2 Iron ore and limestone. 13 Iron sandstone and fossil ore. 
23.0 Lower green shale. $00 Lower green shale. 
Thickness, 80 ft. 6 inches. Thickness, 989 feet. 
POINTS OF DIFFERENCE. 
° 
Diversity of opinion may prevail in regard to the identity of the beds 
of iron ore on the above diagram, but this is of little moment, They are 
usually discontinuous and probably their horizons vary. This is the case 
even within the limits of Perry county and cannot therefore excite sur- 
prise at the distance of several hundred miles. 
No sandstone is shown on the New York section and little limestone in 
Pennsylvania, but the sandstones in the latter are thin, only 10 and 20 feet 
thick respectively, and the same is true of the limestones of New York. 
