

13. rye township. F 3 . 317 



main valley road that the most magnificent display of the 

 Great Horseshoe dyke occurs in Perry county. Here the 

 road for 500 feet on each side of the line is embanked with 

 bowlders that have been removed from the land and piled 

 up in grand disorder. The dyke itself does not probably 

 exceed 200 feet in breadth, but its fragments strewn along 

 both sides make it seem very much wider. ]S"orth and south 

 of this point the exhibition is less striking but the ridge 

 may be traced without difficulty for nearly another mile, 

 when it is lost on the slope of the Blue mountains. The 

 nature of the trap and further details may be found in the 

 account of Penn township. 



Traces of another (the Little Horseshoe dyke) may be 

 found, about 500 yards co the eastward, in a number of loose 

 blocks of trap scattered along the road, but no ridge in any 

 degree resembling the Great Ironstone ridge can be seen. 



