I9 2 G. H. SQUIER 



expected, the coarse material is a fairly representative assem- 

 blage from the different horizons. 



So far there is nothing to suggest glacial action. But two 

 bowlders seen in the railroad cutting are noteworthy on account 

 of their character, and certainly suggest some such agent. 

 They are tabular forms six or seven feet across, and two to 

 three feet thick, derived from the thin-bedded, impure lime- 

 stones of the Potsdam series and are extremely fragile. One, 

 indeed, is divided near the middle by what has every appear- 

 ance of being an old joint about half an inch wide, and the 

 sides still parallel. Their nearest point of origin was several 

 hundred feet distant. How such masses could have traveled 

 even a short distance without falling to pieces, it is hard to see, 

 unless they were firmly embedded in some matrix. 



From a variety of circumstancs, I have the impression that 

 the circs have been well cleaned of rocky debris, and that such 

 material is now accumulating at their upper ends. The indica- 

 tions are strong that little save the finer debris now passes out. 

 For the present, however, I should not care to lay much stress 

 on these impressions. 



While these deposits must be regarded as essentially non- 

 glacial, there does not appear to be anything inconsistent with 

 the assumption that occasionally during periods of exceptional 

 activity, glaciers may have advanced on to them for short 

 periods. 



The field is very far from having been exhaustively worked, 

 and until evidence is more nearly complete I prefer to reserve 

 final expression of opinion. 



G. H. Souier. 



