GLIDTNG DEFORATATTONS 



783 



E. Ordovicic c.vauiplcs of this type are beautifully exposed in 

 the walls of the gorge of East Canada Creek at Trenton Falls, 

 N. Y. Here there are at least three such disturbed zones, one well 



Fig. 167. Corrugated limestone beds, showing the effects of subaqueous 

 gliding. Gaspe hmestone, Canada. Scale about i :200. (After 

 Logan.) 



shown below the Lower or Sherman Falls, one just below the High 

 Falls (now replaced by a high dam), and a third higher up. All of 

 these show a wonderful series of folds and overthrusts. the zones 

 varying in thickness up to 4 meters, and, as is to be expected, dying 



F'iG. 168. Deformation due to sub- Fig. 169. Deformation due to sub- 

 aqueous gliding, Trenton lime- aqueous gliding, Trenton lime- 

 stone. Trenton Falls, N. Y. i 75. stone. Trenton Falls, N. Y. i :ioo. 

 (After Hahn.) (After Miller.) 



out after a while, though traceable for some considerable distance. 

 The upper and lower layers are not disturbed, but absolutely nor- 

 mal, not even showing evidence of excessive compression. The 

 layers involved in the folding are not always the same, sometimes 

 they are granular limestones with abundant organic remains, but 



