226 



CHARLES P. BERKEY AND JESSE E. HYDE 



It seems necessary to assume that, following the deposition, 

 and while the whole mass was thoroughly saturated with water, 

 it was frozen and incorporated in the ice and that there was then 



"^ 



Fig. 4. — A fine sand layer which seems to have been arched since deposition 

 and in the process developed V-shaped notches along the stretched upper margin 

 which are now filled with coarser sand. See explanatory sketch, Fig. 5. 



Fig. 5. — Explanatory drawing to accompany the photograph, Fig. 4 



movement of the ice sheet with its included material. The move- 

 ment in the latter, while probably not great, was sufficient to cause 

 the oversteepening of the sands as they are now found, and the 

 slight amount of contortion and faulting which occurs. Under 



