Some Recent Folds in the Lorraine Shales. 531 



glacial anticlines in the horizontal limestones of Jefferson 

 County, N.Y., and in the shales near Dunkirk in the 

 western part of the State, and states that they may have 

 resulted from expansion caused by the warming up of the 

 surface layers of the rocks as they recovered from the 

 cold of the glacial period."^ He has also described a 

 similar small anticlinal disturbance of Devonian shales in 

 Kipley, the most western township, of New York.^ In a 

 third paper he has described another similar form occur- 

 ring at Thirty-Mile Point, New York.^ 



It is quite probable that the seven small folds which 

 occur in the beds of this section are also to be attributed 

 to the same cause. There are no salt wells or saline 

 springs in the vicinity to cause folding by the sinking of 

 the overlying strata as at Caledonia, New York. 



1. '-Some New Geologie Wrinkles," Anier. Jour. Sci., 3rd sen, Vol. 32, 1SS6, p. 324. 



2. " Post-Glaoial Anticlinal Ridges near Ripley and Caledonia, N.Y., Anier. Geol., 

 Vol. 8, 1591, p. 230. 



3. "Dislocation at Thirty-Mile Point, New York, Bull. Geol. Soc. Anier., Vol. 10, 

 1S98, p. 131. 



